To provide a seat for vehicles in which a seat cushion escape mechanism can be space-saving, the seat having an escape mechanism to shift a seat cushion frame disposed on a base part from a seating posture to an escape posture with the frame placed forward of the base part includes: a support leg part having one end rotatably connected to the frame and the other end rotatably connected to the base part; a guide part to be engaged with the one end of the support leg part to guide the one end so as to lift the one end; a coil spring biasing the support leg part so as to have the one end guided by the guide part and flip up a portion connected with the frame; and a second coil spring which is provided at the other end and applies a biasing force so as to rotate the one end of the support leg part forward with the other end as a center.