A cutter unit includes a cutter holder, a cradle, a cutter lever, a cradle lever, and a transmitting portion. The cradle faces the cutter holder and movable between a full-cut position and a half-cut position. The cutter lever is configured to be contactable with the cutter holder. The cradle lever is configured to be contactable with the cradle. The transmitting portion is configured to move the cutter lever and the cradle lever in interlocking relation therebetween. The transmitting portion is configured to shut off transmission of movement of the cutter lever to the cradle lever in accordance with only operation to the cutter lever out of the cutter lever and the cradle lever while the transmitting portion is configured to transmit movement of the cradle lever to the cutter lever in accordance with only operation to the cradle lever out of the cutter lever and the cradle lever.