Abstract: An catheterization device for a urine bag comprises a urine bag coupled with a sleeve unit, wherein the urine bag includes a conduit connected on the top end thereof and a tubular member connected on the lower end thereof and having a control valve mounted thereon, and the sleeve unit includes a sleeve body, a stop piece, and a double sided tape. The sleeve body includes an opening arranged on one end thereof and a connecting post extending from another end thereof for connecting with the conduit of the urine bag, and includes a ventilation hose extending from one side of the outer periphery thereof. The stop piece includes a through hole arranged at the center thereof and a slot disposed on one side thereof for communicating with the through hole, and the double sided tape is provided to adhere a male genital and the sleeve body.