Provided is a body cavity foreign matter capture instrument, whereby it is possible to easily capture even comparatively large foreign matter, and to smoothly discharge the captured foreign matter. This body cavity foreign matter capture instrument (10) comprises: a first manipulation wire (15)； a plurality of framework wire materials (20), the base end parts whereof are coupled to a leading end part of the first manipulation wire (15), and the leading end parts being respectively bundled together； and a second manipulation wire (25) which is coupled to the leading end parts of the plurality of framework wire materials (20), separates from the first manipulation wire (15) extending toward the base end side of the first manipulation wire (15), and which may be manipulated in isolation from the first manipulation wire (15). By moving the first manipulation wire (15) toward the leading end side relative to the second manipulation wire (25), the framework wire materials (20) expand and configure a basket (30), and by further relatively moving the first manipulation wire (15) toward the leading end side, the basket (30) becomes shallower.
