Abstract: A fly tying bobbin for holding a spool of thread and guiding thread supplied from the spool includes a flat sided holding portion, a pair of opposed spool holding arms and a pair of opposed spool bearing elements. The holding portion is adapted to be held between the thumb and forefinger and to orient the bobbin. The opposed spool holding arms extend from respective attachment points on the holding portion. The attachment points are spaced from each other and define a first axis parallel to the sides. The pair of opposed spool bearing elements are positioned at respective free ends of the pair of spool bearing arms. The spool bearing elements are engagable with respective end surfaces of the spool to rotatably support the spool. The spool bearing elements define a second axis passing therethrough about which the spool is rotatable. The second axis and the first axis are substantially perpendicular.