PURPOSE: A ventilation mini undershirt is provided to greatly promote hygiene and to keep a fresh feeling always when putting on. CONSTITUTION: The ventilation mini running shirt is comprised of the steps of:making up the length of the running shirt(1) so the lower end(2) of the running shirt as to reach only the upper part of a belt(8); forming an air circulation route(5) by making up an inner projection unit(4) with a synthetic fiber which has some elasticity and also is soft on the inner face of the running shirt. Accordingly, sweat secreted on the surface of skin moves with the movement of the air circulation route of the fresh air flowed in from the outside and evaporates so as to prevent the running shirt from sticking to the surface of skin.
