Abstract: The present invention concerns a joining sleeve assembly for joining a metal cookware with a cookware handle. Principally, when a metal cookware piece is bent to form a hollow joining sleeve assembly, a pair of protruding pieces and a pair of corresponding rectangular through holes are joined together by means of inter-coupling linkages or hook-coupling linkages, which are very secure. As a result, effects, such as configuration flexibility, simple construction, attractive appearance, strong joining strength and long working life, can be achieved.