To make a structure that entering and leaving a seat of third row of an automobile is performed by avoiding an occupant on a seat in a second row, falling the seat of the second row and forwardly sliding it and therefore entering and leaving the seat of the third row is hardly performed to a structure that getting in/out is easily performed.

A door 1 is provided on a lateral side of the seat of the third row of the automobile and entering and leaving the seat of the third row can be performed. Further, in order to prevent a parking space from becoming wide, a direction of opening/closing of the door is made to a direction sliding it to a front side 2.