Vehicle seat apparatus

A vehicle seat apparatus comprising:

• a seat main body configured to seat an occupant;
• a first gear that is joined to the seat main body;
• a second gear that is capable of being engaged with the first gear;
• a rotation mechanism that rotates the second gear in a state of being engaged with the first gear and that rotates the seat main body in a yaw direction from a reference direction;
• a biasing part that applies, when the seat main body is rotated by the rotation mechanism, a biasing force in a direction that is opposite to a rotation direction;
• a release control part that releases an engagement between the first gear and the second gear, that rotates the seat main body by a biasing force which is preliminarily biased by the biasing part, and that allows the seat main body to return to the reference direction;
• and
• a regulation part that regulates a rotation speed of the seat main body as a direction of the seat main body approaches to the reference direction when the biasing part allows the seat main body to return to the reference direction.