PROBLEM TO BE SOLVED: To make an elevation driving source compact and low-priced by employing a structure in which the force of the elevation driving source acts efficiently for elevating a seat body.SOLUTION: An elevation mechanism 50 of a seat device for a vehicle according to the present invention includes: a front-side elevation guide 51 which is coupled to a front side of an outer slide member 44 to rotate upward and downward and tilts down at a predetermined angle when the outer slide member 44 is at a forward-movement limit position a rear-side elevation guide 52 which is coupled to a rear side of the outer slide member 44 to rotate upward and downward, and tilts in parallel with the front-side elevation guide 51 when the outer slide member 44 is at the forward-movement limit position an elevation member 60 which is configured to move up and down along the front-side elevation guide 51 etc., having tilted while holding the sheet body in a fixed posture and an elevation driving source which applies elevation force to the elevation member 60 in a direction along the front-side elevation guide 51 etc.COPYRIGHT: (C)2014,JPO&INPIT【課題】本発明は、昇降駆動源の力がシート本体の昇降に効率的に働く構造にして、昇降駆動源の小型化、及び低価格化を図ることを目的とする。【解決手段】本発明に係る車両用シート装置の昇降機構50は、外スライド部材44の前側に上下回動可能な状態で連結されて、外スライド部材44が前進限位置にあるときに下方に所定角度で傾斜する先端側昇降ガイド51と、外スライド部材44の後側に上下回動可能な状態で連結されて、外スライド部材44の前進限位置で先端側昇降ガイド51と平行に傾斜する後側昇降ガイド52と、シート本体の姿勢を一定に保持した状態で傾斜した先端側昇降ガイド51等に沿って昇降可能に構成された昇降部材60と、昇降部材60に対して先端側昇降ガイド51等に沿う方向に昇降力を加える昇降駆動源とを有している。【選択図】図6
