The invention relates to a level meter weight supporting device disposed in the level meter body. A weight is supported in the body; a laser module is installed in the weight; the supporting device comprises a supporting ring and at least two supporting units, two installation parts are disposed on the supporting ring in interval; A supporting ring is disposed in the body; an equal supporting unit is installed in an equal installation part; each supporting unit has a top contacting piece which has a spherical surface and exposed from the inner edge of the supporting ring; the top of the weight is formed with a shaft unit which has at least two accommodating grooves formed on the outer edge corresponding to the supporting units; the shaft unit of the weight is disposed in the supporting ring; the spherical surface of the top contacting piece is inserted into the accommodating groove; and the weight is supported onto the supporting ring in a swing-able way by the equal supporting units.therefore, the invention achieves the advantages of simplified structure, easy mounting and demounting, and convenience in manufacturing, maintaining and correcting.