In 1943, he married Kalpana Datta (1913–1995), a revolutionary, who participated in the Chittagong armoury raid. They had two sons, Chand and Suraj. Chand Joshi (1946-2000) was a noted journalist, who worked for the Hindustan Times. He was also known for his work, "Bhindranwale: Myth and Reality" (1985). Chand's second wife Manini (née Chatterjee, b 1961) is also a journalist, who works for The Telegraph. Manini Chatterjee penned a book on the Chittagong armoury raid, titled, "Do and Die: The Chittagong Uprising 1930-34" (1999).