A portable excrement bag comprises a bag body (10). A bag opening (12) is provided at the top portion of the bag body (10). Two connecting devices (14) are provided on two sides of the bag opening (12) respectively and a user can secure two fingers on two sides of the bag opening (12) by use of the connecting devices so as to control the position or the size of the bag opening (12). The side of each connecting device (14) for affixing the finger thereto is coated with adhesive so as to secure two fingers on two sides of the bag opening (12) more effectively. A snap lock fastener (16) can be provided at the top portion of the bag body (10) near the bag opening (12) to seal the bag body (10). The bottom of the bag body (10) is provided with an opening (18) through which the contents in the bag body (10) can be discharged. A switch (20) can be provided at the opening (18) to control discharge of the contents. A duct (22) connected with the opening (18) can be provided at the opening (18) to direct the contents outwards. The user can use the portable excrement bag in a standing position where a toilet is unavailable, and can bring away the excrement bag after sealing it. The portable excrement bag can be used in the hospitals for collecting urine and feces of the patients.
