Provided is an electric toothbrush, comprising: a handle portion (100) internally provided with a driving device (6) and a control panel (5) connected with each other； a head portion (200) that is connected to the handle portion (100), wherein the head portion includes a U-shaped housing (22) and toothbrush plates (13, 15, 17) movably connected in the U-shaped housing (22), and the surface of the toothbrush plates (13, 15, 17) is provided with bristles (14)； wherein, the driving device (6) is connected with the handle portion (100) through a transmission device, and the driving device (6) drives the toothbrush plates (13, 15, 17) to swing back and forth in the horizontal direction in the U-shaped housing (22) of the head portion (200) by the transmission device, so as to enable the bristles (14) on the toothbrush plates (13, 15, 17) to complete the brushing action. The electric toothbrush has a reasonable structural design, the bristles (14) of the toothbrush are adapted to the shape of human mouth, and the hands can be available when brushing the teeth. The transmission structure is simple and ingenious, which can drive the head portion (200) to swing back and forth in the horizontal direction, and make the bristles (14) around the teeth brush the teeth back and forth. It has the advantage of being suitable for large populations.L'invention concerne une brosse à dents électrique, comprenant : une partie poignée (100) pourvue intérieurement d'un dispositif d'entraînement (6) et d'un panneau de commande (5) reliés l'un à l'autre ； une partie tête (200) qui est reliée à la partie poignée (100), la partie tête comportant un boîtier en forme de U (22) et des plaques de brosse à dents (13, 15, 17) reliées de façon mobile dans le boîtier en forme de U (22), et la surface des plaques de brosse à dents (13, 15, 17) étant pourvue de poils (14) ； le dispositif d'entraînement (6) étant relié à la partie poignée (100) par l'intermédiaire d'un dispositif de transmission, et le d
