Abstract: The present invention relates to a tool head fixer with pressing effect and of wide applications. It mainly comprises a shaft, a rotating socket and a stopping ring, the shaft having a insertion groove in the middle of its front end for inserting a tool head, a pressing bolt with a reposition spring is disposed at the circumference of the shaft, the shaft is inserted and disposed inside the rotating socket and is positioned by the stopping ring, the rotating socket having an acentric groove in corresponding to the pressing bolt, the rotating socket can activate the pressing bolt to press against or relieve the tool head, thus the tool head can be easily and conveniently changed and is firmly fixed, at the same time it is convenient to operate and can be widely used for various applications.