[Object] Provided is a tight fastening type size-free container carrying bag which has a simple configuration, can be manufactured at a low cost, and can be reliably fit to various shapes of containers size freely to stably hold the containers. [Solving Means] Employed is a technical means corresponding to a bag body (1) in which a pair of sheet materials (10, 10) made of a thermoplastic resin material faces and overlaps each other, an opening (11) is formed at a top portion, and a bottom surface (12) is included at a bottom portion, wherein at least one container holding portion is formed in the bag body (1), wherein a holding zone (2) in which a plurality of spot joining portions (21, 21, ...) formed by joining inner surfaces of both the sheet materials (10, 10) of the bag body (1) each other in dot shapes is provided is formed in the container holding portion.