Patent ID: 8205725

Claim:
An electric disk brake comprising: a single electric motor; a pair of rotary-to-linear conversion mechanisms to which rotation of the electric motor is transferred; a pressing member that presses at least one brake pad toward a disk rotor by means of each of the rotary-to-linear conversion mechanisms; and a reduction mechanism interposed between the electric motor and the pair of rotary-to-linear conversion mechanisms, wherein the reduction mechanism transfers a rotary output, where input of the electric motor is increased, to one side of the pair of rotary-to-linear conversion mechanisms, and transfers reaction force of the rotary output to the other side of the pair of rotary-to-linear conversion mechanisms and wherein the reduction mechanism comprises: an input portion into which the rotation of the electric motor is inputted; a first output portion that the rotary output is transferred to one side of the pair of rotary-to-linear conversion mechanisms; and a second output portion that reaction force of the rotary output is transferred to the other side of the pair of rotary-to-linear conversion mechanisms, the input portion, the first output portion and the second output portion being arrange in a concentric manner.