Pelvic floor stimulating device, formed by an airtight container (1) that comprises a handle (4) and contains internally a moving mass (2) having unevenesses so that to prevent that it is freely displaced through the container until a sufficient inertial force exists. Preferably the mass (2) is spherical, ovoid or polyhedric, it is formed by a high-density core surrounded by a soft material and it possesses elongated bosses distributed on its surface. Preferably the handle (4) is formed by a flexible strip having a series of knots (5).