The Mizuma Line (水間線, Mizuma-sen) is a Japanese railway line between Mizuma Kannon Station and Kaizuka Station, all within Kaizuka, Ōsaka.

The company or the line is commonly called Suitetsu (水鉄).

The line opened between December 1925 and January 1926, electrified at 600 VDC.

Freight services ceased in 1972, and in 1990 the line voltage was increased to 1,500 VDC.

This article about a Japanese railway line–related topic is a stub.