Shoe with step-in aid comprising: - a shoe upper having an upper heel part and an upper front part, which are movable in relation to each other, - an insole having a bending point between an insole heel part and an insole front part, which are movable in relation to each other, - a shoe sole having a bending point between a sole heel part and a sole front part, which are movable in relation to each other, - a bistable bending spring unit arranged in the area of the bending point of the insole and the bending point of the shoe sole between the insole and the shoe sole, said bistable bending spring unit having a bistable leaf spring configured to spring between two stable states and a housing (41, 42) at least partially surrounding the leaf spring, wherein the housing comprises a free space for springing between the two stable states of the leaf spring, - wherein a first release means (41B, 42B) is arranged on the housing (41, 42) of the bending spring unit such that it exerts pressure on a first side of the leaf spring in the event of a bending torque acting on the bending spring unit in order to trigger the leaf spring to spring, so that the bending spring unit abruptly changes from a stable first state to a stable second state and moves the shoe into an open state and - wherein a second release means (41A, 42A) is arranged on the housing (41, 42) of the bending spring unit such that it exerts pressure on a second side of the leaf spring, which is opposite the first side, in the event of a restoring torque acting on the bending spring unit and opposing the bending torque, in order to trigger the leaf spring to spring over, so that the bending spring unit returns abruptly from the stable second state to the stable first state and move the shoe into a closed state. - a shoe upper having an upper heel part and an upper front part, which are movable in relation to each other, - an insole having a bending point between an insole heel part and an insole front part, which are movable in relation to each other, - a shoe sole having a bending point between a sole heel part and a sole front part, which are movable in relation to each other, - a bistable bending spring unit arranged in the area of the bending point of the insole and the bending point of the shoe sole between the insole and the shoe sole, said bistable bending spring unit having a bistable leaf spring configured to spring between two stable states and a housing (41, 42) at least partially surrounding the leaf spring, wherein the housing comprises a free space for springing between the two stable states of the leaf spring, - wherein a first release means (41B, 42B) is arranged on the housing (41, 42) of the bending spring unit such that it exerts pressure on a first side of the leaf spring in the event of a bending torque acting on the bending spring unit in order to trigger the leaf spring to spring, so that the bending spring unit abruptly changes from a stable first state to a stable second state and moves the shoe into an open state and - wherein a second release means (41A, 42A) is arranged on the housing (41, 42) of the bending spring unit such that it exerts pressure on a second side of the leaf spring, which is opposite the first side, in the event of a restoring torque acting on the bending spring unit and opposing the bending torque, in order to trigger the leaf spring to spring over, so that the bending spring unit returns abruptly from the stable second state to the stable first state and move the shoe into a closed state.