An oscillatory power tool comprising: an output shaft for mounting a cutting tool and driving the cutting tool in an oscillating rotary motion; a fastener for fastening the cutting tool to the output shaft; the cutting tool comprising a securing section being capable of connecting with the output shaft; a driving section disposed on the free end of the output shaft for engaging with the securing section of the cutting tool; the driving section having a friction surface for contacting a surface of the securing section. Through close fit between the friction surface and the upper surface of the securing section, the oscillatory power tool can be connected with different types of cutting tools, thus greatly improving the universality and convenience of the oscillatory power tool.
