Abstract: A traveller setter having a main mechanism which includes a traveller holder with a guide on the undersurface of a forward end thereof and a magnet arranged at the upper part of said ring flange receiving seat, a traveller engaging hook at a forward end portion thereof for engaging a traveller held by the magnet with a ring flange, a traveller supplier for supplying travellers to the traveller holder. The main mechanism can be encased in a case when not in use by making the traveller engager slidable by a working pin. This traveller setter ensures accurate setting of travellers on ring flanges and requires no skill in handling.