To provide a lubrication structure for a timing chain suppressing wear of the timing chain and a sprocket at starting of an internal combustion engine.

In the lubrication structure for the timing chain wound around a plurality of sprockets, and guided by chain guides (a chain damper 6, an inter-cam chain guide 7, and a chain slipper 8) arranged between adjacent sprockets, the chain guide forms pores 10 in sliding parts 6a, 7a, and 8a on which the timing chain slides, and which hold oil O supplied to the timing chain from an oil feeder.