A motorised head (3) for a breast pump comprising a motor unit (35) including a motor and a drive mechanism (22) for driving a pump, a body mounting portion which is fixedly mountable to a body of a breast pump, a motor mounting portion (39) on which the motor and drive mechanism (22) are disposed, and a resiliently deformable member (49) connecting the body mounting portion and the motor mounting portion such that the resiliently deformable member reduces the transfer of vibration caused by the motor or drive mechanism to a breast pump body to which the body mounting portion is mounted.