To easily mount a bead with a nature of bending inside at both sides on the edge of a panel.

A guide passage 14 is provided on a jig mainbody 13 moved along the edge of a panel, so that a soft bead 2 with a nature of bending inside at both sides 7, being guided to the longitudinal direction, may have both sides 7 opened more than the thickness (t) of the panel. On the exit 16 of the guide passage 14, a pushing portion 20 is provided to push the opened bead 2 against the edge of the panel.