To provide a valve train equipped with a spring seat that can be manufactured simply at low cost in order to prevent the surge of a coil spring, in the valve train of an internal combustion engine equipped with a valve reciprocated by a cam.

The spring seat having a squeeze film effect of damping the axial motion of the coil spring is provided at one end of the coil spring biasing the valve in a closing direction. The spring seat has an oil slit which radially intersects and extends helically around a valve axis.