A side crash test apparatus for a center pillar of an automobile, the side crash test apparatus conducting a side crash test of the center pillar using a crash test structure including: the center pillar of the automobile; a roof-rail simulated part connected to an upper end of the center pillar and simulating a roof rail of the automobile; and a rocker simulated part connected to a lower end of the center pillar and simulating a rocker of the automobile, the side crash test apparatus comprising: a striker configured to crash into a side of the center pillar; a roof rail support configured to support each of a front end and a rear end of the roof-rail simulated part; and a rocker support configured to support each of a front end and a rear end of the rocker simulated part, wherein the rocker support includes a rocker-rotation braking mechanism configured to restrain, when the striker crashes into the center pillar, translation of the rocker simulated part, and support the rocker simulated part to be rotatable about an axis thereof and allow braking of the rotation, characterized in that the rocker-rotation braking mechanism includes a rocker-rotation support member attached to an end face of the rocker simulated part, configured to rotate about the axis together with the rocker simulated part, and having an arc surface formed on at least a part of an outer face, a rocker-rotation shaft support configured to support a rotation center of the rocker-rotation support member to be rotatable while restraining translation thereof, a rocker-rotation braking plate for which one end side is attached to the outer face of the rocker-rotation support member and that is arranged along a tangential direction of the arc surface and, when the striker crashes into the center pillar, is extended by rotation of the rocker-rotation support member while braking the rotation and is wound around the arc surface, and a rocker-rotation braking plate fixed portion configured to fix another end side of the rocker-rotation braking plate. a striker configured to crash into a side of the center pillar; a roof rail support configured to support each of a front end and a rear end of the roof-rail simulated part; and a rocker support configured to support each of a front end and a rear end of the rocker simulated part, wherein the rocker support includes a rocker-rotation braking mechanism configured to restrain, when the striker crashes into the center pillar, translation of the rocker simulated part, and support the rocker simulated part to be rotatable about an axis thereof and allow braking of the rotation, characterized in that restrain, when the striker crashes into the center pillar, translation of the rocker simulated part, and support the rocker simulated part to be rotatable about an axis thereof and allow braking of the rotation, characterized in that the rocker-rotation braking mechanism includes a rocker-rotation support member attached to an end face of the rocker simulated part, configured to rotate about the axis together with the rocker simulated part, and having an arc surface formed on at least a part of an outer face, a rocker-rotation shaft support configured to support a rotation center of the rocker-rotation support member to be rotatable while restraining translation thereof, a rocker-rotation braking plate for which one end side is attached to the outer face of the rocker-rotation support member and that is arranged along a tangential direction of the arc surface and, when the striker crashes into the center pillar, is extended by rotation of the rocker-rotation support member while braking the rotation and is wound around the arc surface, and a rocker-rotation braking plate fixed portion configured to fix another end side of the rocker-rotation braking plate. a rocker-rotation support member attached to an end face of the rocker simulated part, configured to rotate about the axis together with the rocker simulated part, and having an arc surface formed on at least a part of an outer face, a rocker-rotation shaft support configured to support a rotation center of the rocker-rotation support member to be rotatable while restraining translation thereof, a rocker-rotation braking plate for which one end side is attached to the outer face of the rocker-rotation support member and that is arranged along a tangential direction of the arc surface and, when the striker crashes into the center pillar, is extended by rotation of the rocker-rotation support member while braking the rotation and is wound around the arc surface, and a rocker-rotation braking plate fixed portion configured to fix another end side of the rocker-rotation braking plate.