It is intended to provide a device for checking for the lumen passage which has a simple structure and is in the form of a capsule easily broken after a certain period of time in the lumen to thereby ensure discharge of the same. A part (43) of the surface of a meltable part (41)constituting a capsule-shaped construct is exposed as an opening and a non-meltable part (42) covering the surface is formed as a film. Owing to this structure, it is possible that when the meltable part (41) is melted after a certain period of time in the lumen, the filmy non-meltable part (42) cannot retain the capsule shape and, therefore, disintegrates. That is, the discharge ability can be surely improved while employing the simple structure.
