An angular adjusting mechanism for use in a massage device of a massage machine comprises a frame including a swing seat axially disposed thereon for pivotally rotating the angle and including upper and lower massage rollers provided thereon, and between the frame and the swing seat being defined with an angular adjusting mechanism, wherein the angular adjusting mechanism includes a bush axially fixed on the frame, the swing seat includes a driver attached thereon for urging the rotation of a screw, and another end of the screw screws with the bush; thereby during the rotation of the screw, the screw may vertically displace along the bush and actuate the swing seat to axially rotate along the frame for adjusting the swing angle and increasing the support strength of the upper and lower massage rollers.