MOTOR UNIT

A motor unit includes: a motor provided with a first chamber and including a shaft; a rotary member coupled to the shaft outside the first chamber; a housing provided with a second chamber accommodating the rotary member; and a guide member including a peripheral wall between the first chamber and the second chamber, the guide member being provided with a third chamber inside the peripheral wall, wherein the motor unit is provided with a fourth chamber which is outside the first chamber and is open to an inner surface of the second chamber and/or the third chamber, the inner surface of the third chamber includes a guide, and the guide extends farther away from a rotation axis as is closer to the fourth chamber.