A printer includes: a head; a lamp; a condenser lens; a platen; and a lamp cover. The head is configured to eject a light-curable ink onto a printing object. The lamp is movable relative to the printing object in a main scanning direction, and is configured to emit light to irradiate the printing object. The condenser lens is configured to focus the light emitted from the lamp. The platen is configured to support the printing object and to move in a sub scanning direction relative to the head. The lamp cover has translucency, and includes one end portion and the other end portion in the sub scanning direction. Each of the one end portion and the other end portion has an adjustment part. The adjustment part is configured to adjust the light transmitted through the lamp cover by blocking part of the light or diffusing the light.