An ear-cushion mechanism for safety helmet with hand-free cellular phone server. Its main feature is a circular cushion on the ear-muffs of a safety helmet, with an indentation along the inner circumference of the cushion. An elastic net is attached to the inner circumference of the cushion near the bottom. Between the net and the bottom of the indentation is an accommodating space for the hand-free cellular phone server. Besides, on one side of the cushion there is a narrow channel that connects the accommodating space of the cushion with the outside. The hand-free cellular phone server that contains both a speaker and a microphone is put into the accommodating space of the cushion through the narrow channel and held by the elastic net.