Abstract: A semiautomatic rotary razor which comprises a rectangular box-shaped framework, an annular cap detachably secured to one surface of the framework and having a reticulate outer blade, a rotary shaft extending across the framework with one end protruding out of the one surface of the framework, an inner blade assembly detachably mounted at the protruding end of the rotary shaft, a fly wheel and a driven gear mounted on the rotary shaft within the framework, a partition wall extending within the framework along the length thereof, a stub shaft extending within the framework adjacent and in parallel to the rotary shaft and slidably received in the framework and partition wall, a driven gear and a transmission gear mounted on the stub shaft and a slidable rack bar having rack teeth thereon for engaging the driven gear on the stub shaft.