There is provided a magazine capable of preventing jamming of staples in a medical stapler, and reducing manufacturing cost.Width of a space for receiving staples 3 of a magazine 40 is greater than length of the staples 3 and is less than the value resulting from adding length of the staples 3 to1/2 of the diameter of the staples, preferably 1/3 thereof or less. In addition to the above configuration, the magazine 40 is formed as half split bodies 41 and 42 on either side of a rail along the length thereof, a convex positioning part 41a is provided on one of the half split bodies, a concavity 42a for engaging with the positioning convexity is formed on the other half split body, support holes 41c and 42c for engaging with positioning parts are formed in the half split bodies, a locking part 41b for holding engagement with the other half split body is provided on said one of the half split bodies, and a to-be-locked part 42b for engaging with the locking part is formed on the other half split body.
