A vehicle seat belt apparatus includes: a webbing; a lap anchor to which one end portion of the webbing is fixed and that is pivotable in a vehicle longitudinal direction; and a position retaining member that allows the webbing to be slidably inserted therethrough, and that is rigid in the vehicle longitudinal direction and is flexible and elastic in a vehicle transverse direction. In a seat belt retracted state, the position retaining member extends obliquely forward and upward from a lower end portion, and an upper end portion is located ahead of a side support of a seat back and above a seat shield.