A notebook computer with hidden multimedia controller. The notebook computer has a cavity and a multimedia device. A multimedia controller with a plurality of keys to control the multimedia device movably pivoted to the main body. The notebook computer has a switch with a rod. Two magnets are individually disposed on the rod and the multimedia controller. The multimedia controller is attracted, remaining in the cavity. When the switch is pressed, the multimedia controller is pushed out from the cavity by the repulsive magnetic force.