Patent ID: 8555634

Claim:
An electric booster, comprising: a master cylinder; a piston disposed in the master cylinder and configured to generate a fluid pressure in a pressure chamber of the master cylinder by being thrust; a transmission mechanism configured to transmit a driving force of an electric motor to the piston; a board containing casing which contains a board configured to supply driving power to the electric motor; and a motor casing which contains the electric motor and the transmission mechanism, wherein the board containing casing is disposed on the motor casing along a movement direction of the piston, wherein a connector configured to at least supply power to the board is disposed at the board containing casing, and wherein the connector is provided on a surface of the board containing casing where the board containing casing is disposed on the motor casing so that attachment is realized by moving a corresponding connector toward the surface, and detachment is realized by moving the corresponding connector away from the surface.