An inflation assisting implement has a check valve connectable with an injection tube, cuff inflating means which stores a gas or a liquid passing through the check valve and is operative to flow out the gas or the liquid therefrom, controlling means which controls the outflow of the gas or the liquid from the cuff inflating means to a specified flow rate, a stop valve which is normally closed and opened by a specified operation to flow out the gas or the liquid stored in the cuff inflating means, and a connecting part which feeds the gas or the liquid out of the cuff inflating means to a medical implement with cuff, in response to manipulation of the stop valve.
