To provide a side door for vehicle that opening and closing can be certainly and easily done without deteriorating operability on opening and closing, rigidity of vehicle body and airtightness of the vehicle even if after a collision occurs.

An inner side end of a vehicle body 13(a) of a rear face 13 at a side door body 10 on opening the side door body 10 from a closed state is constituted so as to draw a moving locus leaving a front face 15 of a pillar 14 certainly by keeping almost vertical engaging of a claw 17 of a latch 16 with a rod 18(a) of a striker 18 and tilting the rear face 13 of the side door body 10 opposite to the front face 15 of the pillar 14 toward to an inner side of the vehicle body with an inclination greater than perpendicular to the plane establishing a link between an opening and closing center O of the side door body 10 and an inner side end of the vehicle body 13(a) of the rear face 13.