Abstract: A water-proof electronic sound and light tooth brush including a handle and a brush head. The handle is a hollow body formed from a light permeable material, and is adapted to receive a sound and light control device. A tail end thereof is provided with a resonance box. The sound and light control device includes a battery adapted to provide electric power, and a contact switch for actuating a micro central processing unit. The contact switch includes a metal sleeve having an opening and accommodating therein a movable metal ball, the opening of the metal sleeve facing a metal piece remote from the metal sleeve in a non-contact relationship, such that the metal sleeve and the metal piece respectively contact the positive and negative terminals. Furthermore, the micro central processing unit is connected to a music integrated circuit and a speaker thereof. The speaker is provided near an elastic water-proof sound permeable film of the resonance box.