Abstract: Two transverse rod portions of a securing piece having the transverse rod portion at the both ends of a filament portion respectively are simultaneously driven through hollow needles 22 and 22 while journaling one end of a lever 13 so as to approach or separate from a grip portion 12 formed on a body 11 by oscillating, journaling one end of a support table 14 having a bottom support table 14a at the bottom of the body 11, making the front of the support 14 approach or separate from the body 11 by interlocking with the lever 13 and oscillating, and inserting two hollow needles 22 and 22 provided for the bottom of the body 11 into two needle holes 21 and 21 opened in the bottom support table 14a and moreover, an object 7 to be fixed is fixed to an object 6 to be worked by operating the lever 13 while mounting the object 6 to be worked and the object 7 to be fixed on the bottom support table 14a.