A female masturbation device includes a casing, a flexible cup body, a flexible piston, a slide bar, a silica-gel rod and a driver. An exterior wall of a lower end portion of the casing is connected with an upper end of the flexible cup body and an upper end of the flexible piston from the top down in turn. The flexible piston is provided within the flexible cup body forming a negative pressure region between the flexible piston and the flexible cup body. The slide bar passes through the flexible piston, an upper end of the slide bar is connected with the driver, and a lower end of the slide bar is tightly fastened with an upper end of the silica-gel rod. The flexible cup body has a through hole, an arched convergence part and an annular bottom ring. The female masturbation device has the obvious masturbation effect on female.
