A yarn threading apparatus for threading a yarn to a bobbin (Bw) that is mounted to be sandwiched between paired bobbin holders, comprising: a yarn holding member which is configured to hold the yarn; a yarn hooking portion which is formed on one of the bobbin holders; a yarn threading member which includes a yarn engagement portion (62a, 162a) with which the yarn held by the yarn holding member is engaged and is movable between a yarn threading position where yarn threading to the yarn hooking portion is performed and a standby position; a traverse guide which is configured to reciprocally move along an axial direction of the bobbin holder to traverse the yarn wound onto the bobbin (Bw) within a traversal range (r); and a control unit which is configured to control drive of the traverse guide, the yarn engagement portion (62a, 162a) being engaged with the yarn that is held by the yarn holding member while the yarn threading arm is moving from the standby position to the yarn threading position, and when the yarn threading arm is at the yarn threading position, the yarn being disengaged from the yarn engagement portion (62a, 162a) in accordance with the yarn threading to the yarn hooking portion, the yarn threading apparatus further comprising a bunch guide which holds the yarn threaded to the yarn hooking portion to be maintained at a bunch winding position (x) that is outside the traversal range (r) of the bobbin (Bw), the control unit causing the traverse guide to move between a predetermined position which is on the side opposite to the traversal range (r) over the yarn that is held by the bunch guide and the traversal range (r), and the bunch guide causing the yarn held by the bunch guide to be caught by the traverse guide moving from the predetermined position to the traversal range (r) and to be detached from the bunch guide. a yarn holding member which is configured to hold the yarn; a yarn hooking portion which is formed on one of the bobbin holders; a yarn threading member which includes a yarn engagement portion (62a, 162a) with which the yarn held by the yarn holding member is engaged and is movable between a yarn threading position where yarn threading to the yarn hooking portion is performed and a standby position; a traverse guide which is configured to reciprocally move along an axial direction of the bobbin holder to traverse the yarn wound onto the bobbin (Bw) within a traversal range (r); and a control unit which is configured to control drive of the traverse guide, the yarn engagement portion (62a, 162a) being engaged with the yarn that is held by the yarn holding member while the yarn threading arm is moving from the standby position to the yarn threading position, and when the yarn threading arm is at the yarn threading position, the yarn being disengaged from the yarn engagement portion (62a, 162a) in accordance with the yarn threading to the yarn hooking portion, the yarn threading apparatus further comprising a bunch guide which holds the yarn threaded to the yarn hooking portion to be maintained at a bunch winding position (x) that is outside the traversal range (r) of the bobbin (Bw), the control unit causing the traverse guide to move between a predetermined position which is on the side opposite to the traversal range (r) over the yarn that is held by the bunch guide and the traversal range (r), and the bunch guide causing the yarn held by the bunch guide to be caught by the traverse guide moving from the predetermined position to the traversal range (r) and to be detached from the bunch guide.