The invention discloses a side beam and a vehicle. The side beam comprises a side beam body (10) mounted on a floor (30) of the vehicle, wherein the lower part of the side beam body (10) is provided with a groove structure with openings facing inwards; the groove structure is provided with clamping parts (20) for restricting the movement of the side beam body (10) in a Z direction relative to the floor (30); the front and rear sides of the clamping parts (20) are respectively fixedly connected to the front and rear sides of the groove structure; and the upper side of the clamping parts (20) is for being connected to the floor (30). Therefore, the connection strength of the side beam and the clamping part is enhanced to permit a more stable and reliable cooperation between the side beam and a vehicle body, and the limit of the side beam in the Z direction is also realized to avoid the shaking of the clamping part, so that the problem of noise in voids of the side beam is effectively avoided.