To exhibit an insect-repelling effect while minimizing insect repellent intake by people, etc., and to prolong said insect-repelling effect. This insect repellent sheet (1), which can emit an insect repellent, comprises an insect-repelling layer (2) which contains an insect repellent and which is formed from a thermoplastic resin, and two protective layers (3) which contact the outer surfaces of and cover the insect-repelling layer and which are formed from a thermoplastic resin. The crystallinity of the thermoplastic resin configuring the protective layers is less than or equal to the crystallinity of the thermoplastic resin configuring the insect-repelling layer.本發明所提供的防蟲薄片，係既可抑制人類等對其防蟲劑的攝取量，又可發揮防蟲效果，並且很容易就可使防蟲效果更持續。本發明之可釋放出防蟲劑的防蟲薄片(1)，係具有：含有防蟲劑之由熱可塑性樹脂構成的防蟲層(2)；接觸於防蟲層的外表面而將防蟲層夾住之由熱可塑性樹脂構成的兩個保護層(3)。並且，構成保護層之熱可塑性樹脂的結晶化度，係小於或等於構成前述防蟲層之熱可塑性樹脂的結晶化度。
