To provide a bobbin conveying system certainly sorting a tray placed with a real bobbin and an empty bobbin and a bobbin-less tray in a fine spinning winder.

The bobbin conveying system 1 is provided with a tray conveying passage 12 for conveying the tray 20 placed with the real bobbin 24 or the empty bobbin 23; a bobbin sorting device 14 for sorting the tray 20 placed with the real bobbin 24 and the tray 20 placed with the empty bobbin 23; and a bobbin-less tray delivery device 13 in an upstream side of the bobbin sorting device 14. The bobbin sorting device 14 is provided with an empty bobbin feed passage 15 branched from the tray conveying passage 12; and a bobbin sorting guide 42. When the real bobbin 24 is placed on the tray 20, the bobbin sorting guide 42 presses the tray 20 to a passage end on one side of the tray conveying passage 12. On the upstream side of the bobbin sorting device 14, a tray thrust part 45 for pressing the tray 20 to a passage end at the other side of the tray conveying passage 12 is arranged.