Abstract: A dirt collecting apparatus for a vacuum cleaner which is adapted to decrease a volume of a canister body thereby facilitating a handling of the vacuum cleaner and which has a dirt container that is easily detached from the apparatus. The apparatus comprises a dirt collecting chamber connected between a wand and a handle pipe, a cyclone part inserted in the dirt collecting chamber which converts a linear flow in the dirt collecting chamber into a cyctonical flow, and a dirt container mounted on the outer surface of the dirt collecting chamber which receives the dirt separated in the dirt collecting chamber.