To eliminate such problems that a fixed blade or a sliding blade may become hot in hair clippers having the slidable blade capable of being reciprocatively slid on the fixed blade, and in this case, an animal to have the hair being under cutting, or a person holding the hair clippers may feel extremely hot when mistakenly coming into contact with the fixed blade, or the like.

The hair clippers have a cutter head 3 and a body section 2 which can be gripped. In this case, for the cutter head 3, the slidable blade 11 is held in such a manner that the slidable blade 11 can reciprocate-slide to the fixed blade 10. The body section 2 houses a motor 13 to drive the slidable blade 11 of the cutter head 3. Then, a blow-out port 34 in order to blow out cool air to the cutter head 3 is provided in a space between the body section 2 and the cutter head 3 for the constitution.