diff --git a/.changelog/4831.fixed b/.changelog/4831.fixed
new file mode 100644
index 0000000000..f9a27ff5cd
--- /dev/null
+++ b/.changelog/4831.fixed
@@ -0,0 +1 @@
+`opentelemetry-instrumentation-aws-lambda`: use the correct camel case when accessing the SQS message attributes
diff --git a/instrumentation/opentelemetry-instrumentation-aws-lambda/src/opentelemetry/instrumentation/aws_lambda/_sqs.py b/instrumentation/opentelemetry-instrumentation-aws-lambda/src/opentelemetry/instrumentation/aws_lambda/_sqs.py
index bed66962f9..4649d559e6 100644
--- a/instrumentation/opentelemetry-instrumentation-aws-lambda/src/opentelemetry/instrumentation/aws_lambda/_sqs.py
+++ b/instrumentation/opentelemetry-instrumentation-aws-lambda/src/opentelemetry/instrumentation/aws_lambda/_sqs.py
@@ -30,14 +30,14 @@ class _SqsMessageAttributesGetter(Getter[CarrierT]):
     """Extracts W3C trace context from SQS message attribute dicts.
 
     SQS message attributes have the structure:
-    ``{"traceparent": {"DataType": "String", "StringValue": "00-..."}}``.
+    ``{"traceparent": {"dataType": "String", "stringValue": "00-..."}}``.
     """
 
     def get(self, carrier: CarrierT, key: str) -> list[str] | None:
         msg_attr = carrier.get(key)
         if not isinstance(msg_attr, Mapping):
             return None
-        value = msg_attr.get("StringValue")
+        value = msg_attr.get("stringValue")
         return [value] if isinstance(value, str) else None
 
     def keys(self, carrier: CarrierT) -> list[str]:
diff --git a/instrumentation/opentelemetry-instrumentation-aws-lambda/tests/mocks/sqs_event.py b/instrumentation/opentelemetry-instrumentation-aws-lambda/tests/mocks/sqs_event.py
index 6a04ef5677..93f9a0777d 100644
--- a/instrumentation/opentelemetry-instrumentation-aws-lambda/tests/mocks/sqs_event.py
+++ b/instrumentation/opentelemetry-instrumentation-aws-lambda/tests/mocks/sqs_event.py
@@ -41,8 +41,8 @@
             },
             "messageAttributes": {
                 "traceparent": {
-                    "DataType": "String",
-                    "StringValue": "00-5ce0e9a56015fec5aadfa328ae398115-ab54a98ceb1f0ad2-01",
+                    "dataType": "String",
+                    "stringValue": "00-5ce0e9a56015fec5aadfa328ae398115-ab54a98ceb1f0ad2-01",
                 }
             },
             "md5OfBody": "e4e68fb7bd0e697a0ae8f1bb342846b3",
@@ -68,8 +68,8 @@
             },
             "messageAttributes": {
                 "TRACEPARENT": {
-                    "DataType": "String",
-                    "StringValue": "00-5ce0e9a56015fec5aadfa328ae398115-ab54a98ceb1f0ad2-01",
+                    "dataType": "String",
+                    "stringValue": "00-5ce0e9a56015fec5aadfa328ae398115-ab54a98ceb1f0ad2-01",
                 }
             },
             "md5OfBody": "e4e68fb7bd0e697a0ae8f1bb342846b3",
@@ -155,8 +155,8 @@
             },
             "messageAttributes": {
                 "Traceparent": {
-                    "DataType": "String",
-                    "StringValue": "00-aabbccddeeff00112233445566778899-aabbccddeeff0011-01",
+                    "dataType": "String",
+                    "stringValue": "00-aabbccddeeff00112233445566778899-aabbccddeeff0011-01",
                 }
             },
             "md5OfBody": "e4e68fb7bd0e697a0ae8f1bb342846b4",
@@ -176,8 +176,8 @@
             },
             "messageAttributes": {
                 "traceparent": {
-                    "DataType": "String",
-                    "StringValue": "00-cafebabe12345678cafebabe12345678-cafebabe12345678-01",
+                    "dataType": "String",
+                    "stringValue": "00-cafebabe12345678cafebabe12345678-cafebabe12345678-01",
                 }
             },
             "md5OfBody": "e4e68fb7bd0e697a0ae8f1bb342846b5",
@@ -214,7 +214,7 @@
 # Malformed: no Records key at all, _is_sqs_event should return False.
 MOCK_MALFORMED_SQS_EVENT_NO_RECORDS_KEY = {"body": "oops, no Records key"}
 
-# SQS event with a traceparent whose StringValue is not a valid W3C traceparent.
+# SQS event with a traceparent whose stringValue is not a valid W3C traceparent.
 # The propagator will parse it as an invalid context, no span link should be extracted.
 MOCK_LAMBDA_SQS_EVENT_INVALID_TRACEPARENT = {
     "Records": [
@@ -230,8 +230,8 @@
             },
             "messageAttributes": {
                 "traceparent": {
-                    "DataType": "String",
-                    "StringValue": "not-a-valid-traceparent",
+                    "dataType": "String",
+                    "stringValue": "not-a-valid-traceparent",
                 }
             },
             "md5OfBody": "e4e68fb7bd0e697a0ae8f1bb342846b3",
@@ -267,8 +267,8 @@
     ]
 }
 
-# SQS event where the attribute dict has DataType but no StringValue key.
-# The getter returns None for missing StringValue, no link is extracted.
+# SQS event where the attribute dict has dataType but no stringValue key.
+# The getter returns None for missing stringValue, no link is extracted.
 MOCK_LAMBDA_SQS_EVENT_MISSING_STRING_VALUE = {
     "Records": [
         {
@@ -352,8 +352,8 @@
             },
             "messageAttributes": {
                 "traceparent": {
-                    "DataType": "String",
-                    "StringValue": "00-5ce0e9a56015fec5aadfa328ae398115-ab54a98ceb1f0ad2-01",
+                    "dataType": "String",
+                    "stringValue": "00-5ce0e9a56015fec5aadfa328ae398115-ab54a98ceb1f0ad2-01",
                 }
             },
             "md5OfBody": "e4e68fb7bd0e697a0ae8f1bb342846b3",
@@ -373,8 +373,8 @@
             },
             "messageAttributes": {
                 "traceparent": {
-                    "DataType": "String",
-                    "StringValue": "00-8a3c60f7d188f8fa79d48a391a778fa6-53995c3f42cd8ad8-01",
+                    "dataType": "String",
+                    "stringValue": "00-8a3c60f7d188f8fa79d48a391a778fa6-53995c3f42cd8ad8-01",
                 }
             },
             "md5OfBody": "e4e68fb7bd0e697a0ae8f1bb342846b4",