To completely remove the residual thread of a bobbin by repeatedly operating a residual thread removing means until the residual thread is completely removed from the bobbin in a residual thread processing device removing the residual thread from the bobbin.

For the residual thread process of a bobbin (b) conveyed on a tray (t), the tray (t) is stopped so that the bobbin (b) is located below a bobbin holding member C. The holding member C is lowered, an introduction guide 4 and a picker 6 are inserted into the top hole b1 of the bobbin (b), then the bobbin (b) is held by the picker 6 expanded by compressed air. A pusher 7 is lifted, the bobbin (b) is extracted from a peg and lifted, and the bobbin (b) is pinched by grippers 17a, 17b via the shift of slide blocks 14a, 14b. The bobbin (b) is lowered, and a residual thread (y) is hooked on strip pieces 21a, 21b and stripped. These actions are repeated until a photoelectric sensor detects that no residual thread (y) is left on the bobbin (b).