Abstract: Disclosed herein is a hair clipper comprising a housing, a blade set including a first or stationary blade, including thereon a bracket defining a groove, and a blade set mounting assembly including a mounting plate fixed to the housing, a tongue removably extending into the groove, a hinge pin connecting the tongue and the mounting plate to afford pivotal movement of the tongue relative to the mounting plate between a first position permitting insertion and withdrawal of the tongue relative to the groove, and a second position preventing such insertion and withdrawal, a leaf spring secured to the mounting plate and including a portion engaging the tongue for selectively and releasably holding the tongue in the first and second positions, and a spring retainer mounted on the mounting plate and including a tip and spaced wings releasably gripping the bracket to releasably retain the blade set on the tongue, and a helical spring bearing, at one end, against the housing and bearing, at the other end, against the