diff --git a/qiskit/circuit/library/standard_gates/ecr.py b/qiskit/circuit/library/standard_gates/ecr.py
index f626f85db39e..25a2b86c04ed 100644
--- a/qiskit/circuit/library/standard_gates/ecr.py
+++ b/qiskit/circuit/library/standard_gates/ecr.py
@@ -103,6 +103,10 @@ def _define(self):
 
         self.definition = qc
 
+    def inverse(self):
+        """Return inverse ECR gate (itself)."""
+        return ECRGate()  # self-inverse
+
     def to_matrix(self):
         """Return a numpy.array for the ECR gate."""
         return (
diff --git a/releasenotes/notes/add-inverse-ecr-e03720252a0c9c1e.yaml b/releasenotes/notes/add-inverse-ecr-e03720252a0c9c1e.yaml
new file mode 100644
index 000000000000..56a6dfd77f79
--- /dev/null
+++ b/releasenotes/notes/add-inverse-ecr-e03720252a0c9c1e.yaml
@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    The method :meth:`.ECRGate.inverse` now returns another :class:`.ECRGate` instance
+    rather than a custom gate, since it is self inverse.