Valve train of an internal combustion engine

A valve train of an internal combustion engine with at least one camshaft on which at least one rotatable cam is arranged fixed in the axial direction, wherein a rotationally fixed connection of the at least one cam with the camshaft can be selectively established and released by an associated coupling-like locking device. So that the valve train has a compact construction and low production costs and nevertheless low wear in operation, it is provided that the locking device is held within the cam and has a spring-loaded, annular locking collar that can move in the axial direction on the camshaft and, as a counter part to the locking collar, locking shoes (′) coupled with the cam, wherein, in a locking position, the locking collar is pressed against the locking shoes (′) by contacting, ramp-shaped boundary surfaces formed on the locking collar and the locking shoes (′), so that radial projections arranged on the locking shoes (′) engage in adjacent, pocket-shaped receptacles of the camshaft by a radial force and, in an unlocked position, the locking collar is released from the locking shoes (′) by a force acting against the radial force.