The present invention relates to the field of toys, and more specifically, to a magnet-mounted part for mounting a magnet and a magnet toy. Particularly, the present invention provides a magnet-mounted part comprising: a magnet mounting unit on which a magnet is mounted, and which has a saw-toothed wheel engaged with the magnet-mounted part on which an external magnet is mounted, an accommodation unit which accommodates the magnet-mounted unit therein, and has an opening portion such that the saw-toothed wheel of the magnet-mounted unit can be exposed; and a One rotation angle-adjusting unit which is provided to rotate in engagement with the magnet-mounted unit and the accommodation unit, and is formed such that the unit rotation intervals thereof are smaller than the toothed intervals of the saw-toothed wheel of the magnet-mounted unit.