Joseph "Nin-Nin" Reinhardt (1912–1982) was the younger brother of guitarist Django Reinhardt and played rhythm guitar on most of Django's pre-war recordings, especially those with the Quintette du Hot Club de France between 1934 and 1939.

He was a pioneer of the amplified jazz guitar in France and performed for years on a home-made instrument of his own design.

Reinhardt was born in Paris, France, on 1 March 1912, two years after his famous brother.

Joseph Reinhardt was a member of the Quintette du Hot Club de France which recorded from 1934 to 1939.

Beginning in 1943, he recorded as a solo act and with the Hot Four led by Stéphane Grappelli.