A portable power tool includes a first handle extending in an elongated manner and configured to be held by a user, an electric motor, a tool accessory that undergoes orbital and/or rotational motion in response to generation of a rotational driving force by the electric motor, and a battery mounting part configured to detachably attach a battery that serves as a power source for the electric motor. The battery mounting part includes an upward mounting surface on which the battery is mountable, and at least one terminal configured to be electrically connected to the battery when a surface of the battery that includes a connection interface is placed on the mounting surface. The mounting surface is located at a position different from the first handle in the front-rear direction, and is located below an upper side of the first handle in the up-down direction.