diff --git a/Lib/importlib/resources/_common.py b/Lib/importlib/resources/_common.py
index 8c0be7ee547e01..92a37e2c12b8d9 100644
--- a/Lib/importlib/resources/_common.py
+++ b/Lib/importlib/resources/_common.py
@@ -155,5 +155,5 @@ def _write_contents(target, source):
         for item in source.iterdir():
             _write_contents(child, item)
     else:
-        child.open('wb').write(source.read_bytes())
+        child.write_bytes(source.read_bytes())
     return child
diff --git a/Misc/NEWS.d/next/Library/2022-12-28-17-38-39.gh-issue-100585.BiiTlG.rst b/Misc/NEWS.d/next/Library/2022-12-28-17-38-39.gh-issue-100585.BiiTlG.rst
new file mode 100644
index 00000000000000..0bf33b8bdd027d
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-12-28-17-38-39.gh-issue-100585.BiiTlG.rst
@@ -0,0 +1 @@
+Fixed a bug where importlib.resources.as_file was leaving file pointers open