An insect trapping device comprises a box unit, a top cover body detachably disposed on the box unit, a bottom cover body disposed on the box unit, and a trap unit disposed on the top cover body. The cartridge unit includes an upper body having an upper opening and at least one trap channel, and a lower body connected to the upper body. In a state of use, the upper body forms a first trap space communicating with the at least one trap channel, and the lower body forms a second trap space communicating with the first trap space, and the cassette unit, The space occupied by the top cover body and the bottom cover body has a first volume, and in a non-use state, the space occupied by the box unit, the top cover body and the bottom cover body has a second volume, and The second volume is smaller than the first volume.一種誘蟲裝置，包含一盒具單元、一可拆卸地設置於盒具單元的頂蓋體、一設置於盒具單元的底蓋體及一設置於頂蓋體的誘蟲單元。盒具單元包括一具有一上開口及至少一誘蟲通道的上本體，及一與上本體相連設的下本體。在一使用狀態，上本體會形成一與至少一誘蟲通道相連通的第一誘蟲空間，下本體會形成一與第一誘蟲空間相連通的第二誘蟲空間，且盒具單元、頂蓋體及底蓋體三者共同佔據的空間具有一第一體積，而在一非使用狀態，盒具單元、頂蓋體及底蓋體三者共同佔據的空間具有一第二體積，且第二體積小於第一體積。
