A diurnal-insect collecting device has modularized components that can be conveniently assembled and disassemble on site. The disassembled diurnal-insect collecting device can be reduced to a compact and portable size that is favorable to storage and transpiration. The diurnal-insect collecting device is designed to make good use of the natural phototactic behavior of diurnal insects to collect target insects effectively in various environments without adversely affecting the local ecosystem, soil and plants.本發明係關於一種日行性昆蟲捕捉裝置,其採用現地組裝式之模組化設計,不僅具有便於組裝設置及拆解收納之優點,且收合時不佔空間,亦於收藏且便於攜帶,可廣泛應用於各種環境中,充分利用日行性昆蟲日間趨光之習性以不影響現地生態、土壤及作物之方式有效捕捉目標昆蟲。100‧‧‧日行性昆蟲捕捉裝置30‧‧‧可撓性遮光結構35‧‧‧固定結構50‧‧‧透光性昆蟲收集結構