[Problem] To exhibit an insect repelling effect while minimizing insect repellent intake by people etc. and to prolong said insect repelling effect. [Solution] This insect repellent fiber (1) which can emit an insect repellent comprises a core part (2) which contains an insect repellent (4) and which is formed from a thermoplastic resin and a sheath part (3) which contacts the outer surface of and covers the core part and which is formed from a thermoplastic resin. The crystallinity of the thermoplastic resin configuring the sheath part is less than or equal to the crystallinity of the thermoplastic resin configuring the core part.
