diff --git a/src/OpenTelemetry/CHANGELOG.md b/src/OpenTelemetry/CHANGELOG.md
index 78891b4e3a2..467b06e5666 100644
--- a/src/OpenTelemetry/CHANGELOG.md
+++ b/src/OpenTelemetry/CHANGELOG.md
@@ -11,6 +11,8 @@
   `AddInstrumentation` method.
   ([#4873](https://github.com/open-telemetry/opentelemetry-dotnet/pull/4873))
 
+* Allowed metric instrument names to contain `/` characters. ([#4882](https://github.com/open-telemetry/opentelemetry-dotnet/pull/4882))
+
 ## 1.6.0
 
 Released 2023-Sep-05
diff --git a/src/OpenTelemetry/Metrics/Builder/MeterProviderBuilderSdk.cs b/src/OpenTelemetry/Metrics/Builder/MeterProviderBuilderSdk.cs
index bcca0a16456..baaa3521551 100644
--- a/src/OpenTelemetry/Metrics/Builder/MeterProviderBuilderSdk.cs
+++ b/src/OpenTelemetry/Metrics/Builder/MeterProviderBuilderSdk.cs
@@ -46,7 +46,7 @@ public MeterProviderBuilderSdk(IServiceProvider serviceProvider)
     // Customers: This is not guaranteed to work forever. We may change this
     // mechanism in the future do this at your own risk.
     public static Regex InstrumentNameRegex { get; set; } = new(
-        @"^[a-z][a-z0-9-._]{0,254}$", RegexOptions.IgnoreCase | RegexOptions.Compiled);
+        @"^[a-z][a-z0-9-._/]{0,254}$", RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
     public List<InstrumentationRegistration> Instrumentation { get; } = new();
 
diff --git a/test/OpenTelemetry.Tests/Metrics/MetricTestData.cs b/test/OpenTelemetry.Tests/Metrics/MetricTestData.cs
index a4614778597..8c5721f96ba 100644
--- a/test/OpenTelemetry.Tests/Metrics/MetricTestData.cs
+++ b/test/OpenTelemetry.Tests/Metrics/MetricTestData.cs
@@ -39,6 +39,7 @@ public static IEnumerable<object[]> ValidInstrumentNames
                 new object[] { "my_metric2" },
                 new object[] { new string('m', 255) },
                 new object[] { "CaSe-InSeNsItIvE" },
+                new object[] { "my_metric/environment/database" },
        };
 
     public static IEnumerable<object[]> InvalidHistogramBoundaries