To easily and surely attach and detach an oil filter.

In an oil filter wrench 1 where the inner periphery of the rising peripheral wall 3a of a dished tool body 3 is shaped in correspondence to an oil filter tip part 21a, and a protruding part 2 for fitting a driving tool 10 such as a ratchet handle or a closed wrench is provided in a central section, strength necessary for loosing a tightly fastened oil filter 21 is given to the protruding part 2, and torque inputted in the protruding part 2 is broken up by an umbrella part 2a and transmitted to the dished tool body 3 to rotate the oil filter 21, and the umbrella part 2a formed unitedly with a steel protruding part 2 is insertedly formed in the dished tool body 3 made of light alloy or fiber reinforced plastic resin.