Abstract: [Problems] Objects include providing a sealing device capable of sealing a bag-shaped film body containing waste and the like while having a simple structure. [Solution] The sealing device (10) of the present invention includes: a frame member (11) having an opening portion (111), an engaging portion (113) with which a first portion (A1) of the bag-shaped film body (20) is engaged, and a heater unit (114); a moving member (12) having an attaching portion (120) to which a second portion (A2) of the bag-shaped film body (20) is attached and a heater receiving portion (121); and a handle member (13) that is slidably inserted in the frame member (11) and coupled to the moving member (12).