A collision test apparatus using a structural member of an automobile body as a test sample, the collision test apparatus comprises: a first test sample support, the first test sample support comprising: a linear main body; a first attachment part connected by welding to one end of both ends of the linear main body and to be secured to one end of the structural member; and a second attachment part connected by welding to the other end of the linear main body, wherein a cross section of the main body is an open section and is cross-shaped or H-shaped; a second test sample support, the second test sample support comprising: a further linear main body; a further first attachment part connected by welding to one end of both ends of the further linear main body and to be secured to the other end of the structural member; and a further second attachment part connected by welding to the other end of the further linear main body, wherein a cross section of the further linear main body is an open section and is cross-shaped or H-shaped; a wall to which the second attachment part and further second attachment part are secured; an impactor for applying impact to the structural member from its side; a camera for observing deformation behavior of the structural member; and a measurement instrument for measuring a load acting on the impactor and a displacement of the impactor. a first test sample support, the first test sample support comprising: a linear main body; a first attachment part connected by welding to one end of both ends of the linear main body and to be secured to one end of the structural member; and a second attachment part connected by welding to the other end of the linear main body, wherein a cross section of the main body is an open section and is cross-shaped or H-shaped; a linear main body; a first attachment part connected by welding to one end of both ends of the linear main body and to be secured to one end of the structural member; and a second attachment part connected by welding to the other end of the linear main body, wherein a cross section of the main body is an open section and is cross-shaped or H-shaped; a second test sample support, the second test sample support comprising: a further linear main body; a further first attachment part connected by welding to one end of both ends of the further linear main body and to be secured to the other end of the structural member; and a further second attachment part connected by welding to the other end of the further linear main body, wherein a cross section of the further linear main body is an open section and is cross-shaped or H-shaped; a wall to which the second attachment part and further second attachment part are secured; an impactor for applying impact to the structural member from its side; a camera for observing deformation behavior of the structural member; and a measurement instrument for measuring a load acting on the impactor and a displacement of the impactor. a further linear main body; a further first attachment part connected by welding to one end of both ends of the further linear main body and to be secured to the other end of the structural member; and a further second attachment part connected by welding to the other end of the further linear main body, wherein a cross section of the further linear main body is an open section and is cross-shaped or H-shaped; a wall to which the second attachment part and further second attachment part are secured; an impactor for applying impact to the structural member from its side; a camera for observing deformation behavior of the structural member; and a measurement instrument for measuring a load acting on the impactor and a displacement of the impactor.