A coil component comprising: a coil winding portion formed by a single conductor being wound more than once around a coil axis (L), a first slit being formed in one end portion of the coil winding portion in a coil axis direction along the coil axis (L) and a second slit being formed in the other end portion of the coil winding portion in the coil axis direction by the conductor being wound; a first insulating member including an annular first covering member covering the one end portion of the coil winding portion , a first tube portion extending from an inner edge of the first covering member to the coil winding portion side along the coil axis direction and inserted inside the coil winding portion , a first protruding portion provided on the coil winding portion side of the first covering member and fitted into the first slit , and a first locking portion provided in the first tube portion ; and a second insulating member including an annular second covering member covering the other end portion of the coil winding portion , a second tube portion extending from an inner edge of the second covering member to the coil winding portion side along the coil axis direction and inserted inside the coil winding portion , a second protruding portion provided on the coil winding portion side of the second covering member and fitted into the second slit , and a second locking portion provided in the second tube portion and locked in the first locking portion in a state where the first protruding portion is fitted into the first slit and the second protruding portion is fitted into the second slit . a coil winding portion formed by a single conductor being wound more than once around a coil axis (L), a first slit being formed in one end portion of the coil winding portion in a coil axis direction along the coil axis (L) and a second slit being formed in the other end portion of the coil winding portion in the coil axis direction by the conductor being wound; a first insulating member including an annular first covering member covering the one end portion of the coil winding portion , a first tube portion extending from an inner edge of the first covering member to the coil winding portion side along the coil axis direction and inserted inside the coil winding portion , a first protruding portion provided on the coil winding portion side of the first covering member and fitted into the first slit , and a first locking portion provided in the first tube portion ; and a second insulating member including an annular second covering member covering the other end portion of the coil winding portion , a second tube portion extending from an inner edge of the second covering member to the coil winding portion side along the coil axis direction and inserted inside the coil winding portion , a second protruding portion provided on the coil winding portion side of the second covering member and fitted into the second slit , and a second locking portion provided in the second tube portion and locked in the first locking portion in a state where the first protruding portion is fitted into the first slit and the second protruding portion is fitted into the second slit . <EOS>