Disclosed is a massaging force detection mechanism of massager, which comprises a swinging base having massage rollers pivotally mounted to a machine frame and a massaging force detection mechanism arranged between the swinging base and the machine frame. The massaging force detection mechanism comprises at least a connection member pivotally mounted to the swinging base. An opposite end of the connection end is pivotally connected to a detent member. The other end of the detent member is pivotally connected to the machine frame. When the massage rollers of the swinging base are subjected to a reaction force by being pressed down by a human body, the connection member drives the detent member to make a pivotal movement. A detector connected with a controller is arranged at one side of the detent member to detect the displacement change of the detent member and transmit a detection signal to the controller, where the controller compares and calculates the massaging force accordingly. By this way, when the massage rollers press on different parts of the human body or on different body shape curves, the controller draws and depicts the positions of different parts or shape curves of the human body according to the reaction force generated by different parts of the body so as to execute appropriate massage modes and appropriate massaging forces for different parts of body in order to effectively increase the efficacy of massage.
