A fishing reel comprising: a spool that is rotatably supported between left and right side plates (1A, 1B) of a reel body; a fishing line guide body including a fishing line threading section through which a fishing line to be unreeled from the spool is threaded and a main body engaged with a worm shaft provided between the left and right side plates (1A, 1B), the fishing line guide body reciprocating between the left and right side plates (1A, 1B) through the rotational drive of the worm shaft; and a clutch mechanism that switches the spool between a fishing line winding state and a fishing line unwinding state, wherein the fishing line guide body is supported in front of the spool so as to be switched and movable between the fishing line unwinding state and the fishing line winding state, characterized in that the fishing line threading section and the main body are formed separately and integrated with each other; a contact portion of the fishing line threading section is configured to come into contact with a receiving portion of the main body, so that an engagement protrusion extending from the contact portion is fitted into a fitting hole (61 e) of the receiving portion in a direction in which the contact portion comes into contact with the receiving portion, thereby the fishing line threading section and the main body are detachably integrated with each other, wherein both the contact portion and the receiving portion are formed of flat surfaces that are configured to come into contact with each other in a direction in which the engagement protrusion is fitted into the fitting hole, wherein a screw hole is formed at the main body and a screw hole is formed at the engagement protrusion so as to be coaxial with the screw hole of the main body when the engagement protrusion is fitted into the fitting hole, and wherein the fishing reel further comprises a fixing member in the form of a screw such that, when the fixing member is tightened into the screw hole of the main body and into the screw hole of the engagement protrusion while the engagement protrusion is fitted into the fitting hole and the contact portion and the receiving portion are positioned by coming into contact with each other, the fishing line threading section and the main body are detachably integrated with each other. a spool that is rotatably supported between left and right side plates (1A, 1B) of a reel body; a fishing line guide body including a fishing line threading section through which a fishing line to be unreeled from the spool is threaded and a main body engaged with a worm shaft provided between the left and right side plates (1A, 1B), the fishing line guide body reciprocating between the left and right side plates (1A, 1B) through the rotational drive of the worm shaft; and a clutch mechanism that switches the spool between a fishing line winding state and a fishing line unwinding state, wherein the fishing line guide body is supported in front of the spool so as to be switched and movable between the fishing line unwinding state and the fishing line winding state, characterized in that the fishing line threading section and the main body are formed separately and integrated with each other; a contact portion of the fishing line threading section is configured to come into contact with a receiving portion of the main body, so that an engagement protrusion extending from the contact portion is fitted into a fitting hole (61 e) of the receiving portion in a direction in which the contact portion comes into contact with the receiving portion, thereby the fishing line threading section and the main body are detachably integrated with each other, wherein both the contact portion and the receiving portion are formed of flat surfaces that are configured to come into contact with each other in a direction in which the engagement protrusion is fitted into the fitting hole, wherein a screw hole is formed at the main body and a screw hole is formed at the engagement protrusion so as to be coaxial with the screw hole of the main body when the engagement protrusion is fitted into the fitting hole, and wherein the fishing reel further comprises a fixing member in the form of a screw such that, when the fixing member is tightened into the screw hole of the main body and into the screw hole of the engagement protrusion while the engagement protrusion is fitted into the fitting hole and the contact portion and the receiving portion are positioned by coming into contact with each other, the fishing line threading section and the main body are detachably integrated with each other.