An oil applying guide (40, 60) which applies oil to a yarn running downward from above, the oil applying guide (40, 60) comprising a guide main body in which a passage allowing the oil to flow downward from above is formed, and the passage including: a yarn contact surface with which the yarn makes contact, the yarn leaving the yarn contact surface at a downstream end portion of the yarn contact surface in an oil flow direction in which the oil flows; an oil discharging surface (57, 61) which allows the oil to be discharged, which is provided downstream of the yarn contact surface in the oil flow direction, and which is formed so that a distance between the oil discharging surface (57, 61) and a yarn path increases toward a downstream side in the oil flow direction; and paired regulating surfaces formed at both ends, in a width direction of the passage, of the passage, the paired regulating surfaces being formed on both sides, in the width direction, of the yarn contact surface, and not being formed on both sides, in the width direction, of at least an upstream end portion of the oil discharging surface (57, 61) in the oil flow direction, characterized in that, when the guide main body is provided so that the yarn running downward from above makes contact with the yarn contact surface, an angle (θb) formed between the oil discharging surface (57, 61) and the vertical line is within a range of 60 to 72 degrees in the cross section cut along a direction orthogonal to the width direction. a guide main body in which a passage allowing the oil to flow downward from above is formed, and the passage including: a yarn contact surface with which the yarn makes contact, the yarn leaving the yarn contact surface at a downstream end portion of the yarn contact surface in an oil flow direction in which the oil flows; an oil discharging surface (57, 61) which allows the oil to be discharged, which is provided downstream of the yarn contact surface in the oil flow direction, and which is formed so that a distance between the oil discharging surface (57, 61) and a yarn path increases toward a downstream side in the oil flow direction; and paired regulating surfaces formed at both ends, in a width direction of the passage, of the passage, the paired regulating surfaces being formed on both sides, in the width direction, of the yarn contact surface, and not being formed on both sides, in the width direction, of at least an upstream end portion of the oil discharging surface (57, 61) in the oil flow direction, characterized in that, when the guide main body is provided so that the yarn running downward from above makes contact with the yarn contact surface, an angle (θb) formed between the oil discharging surface (57, 61) and the vertical line is within a range of 60 to 72 degrees in the cross section cut along a direction orthogonal to the width direction. a yarn contact surface with which the yarn makes contact, the yarn leaving the yarn contact surface at a downstream end portion of the yarn contact surface in an oil flow direction in which the oil flows; an oil discharging surface (57, 61) which allows the oil to be discharged, which is provided downstream of the yarn contact surface in the oil flow direction, and which is formed so that a distance between the oil discharging surface (57, 61) and a yarn path increases toward a downstream side in the oil flow direction; and paired regulating surfaces formed at both ends, in a width direction of the passage, of the passage, the paired regulating surfaces being formed on both sides, in the width direction, of the yarn contact surface, and not being formed on both sides, in the width direction, of at least an upstream end portion of the oil discharging surface (57, 61) in the oil flow direction, characterized in that, when the guide main body is provided so that the yarn running downward from above makes contact with the yarn contact surface, an angle (θb) formed between the oil discharging surface (57, 61) and the vertical line is within a range of 60 to 72 degrees in the cross section cut along a direction orthogonal to the width direction.