A deflector apparatus for a vehicle includes a deflector, a support member and a torsion spring. The deflector includes arm portions provided as a pair, and each of the arm portions includes a shaft portion and a cam protruding portion. The support member includes a support recessed portion in which the shaft portion is inserted, a cam recessed portion in which the cam protruding portion is inserted and a support protruding portion. The torsion spring includes a turning portion attached to the support protruding portion, and a first leg portion and a second leg portion each extended in the vehicle front and rear direction from the turning portion. The first leg portion includes a distal end portion which can be in slide contact with the arm portion and the second leg portion includes a distal end portion which can be in slide contact with the support member.