disclosed is a motor supporting apparatus of a clothing drier comprising : first and second motor hubs respectively protruding at both sides of a motor ; a supporting rib formed at a case for supporting the first motor hub ; and a supporting member assembled at a lateral surface of the case by a sliding method for supporting the second motor hub . the apparatus simplifies assembly processes , enhances a mass production characteristic , and simplifies a service performance by improving a motor supporting structure and thereby enabling assembly / disassembly of a motor without disassembling a drum .