Shirt finishing machine with function for extending collar

A shirt finishing machine with a function for extending a collar, comprising a collar iron buck on which the collar of a shirt is mounted while being extended in a lateral direction and a press iron for press finishing the collar while pressing against an upper surface of the collar iron buck, a central part of the upper surface of the collar iron buck corresponding to a central part of the collar in its longitudinal direction is notched to provide an inverse triangular-shape in a plane through said central part perpendicular to the upper surface of the collar iron buck, the upper surface having right and left horizontal plates communicated with the upper surface of the collar iron buck corresponding to the central part of the upper surface, said horizontal plates corresponding to both ends of the collar in the longitudinal direction of the collar, said plates formed into a horizontal surface shape, and when the upper surface of the collar iron buck is depressed with the press iron, the iron is set to be a flat surface shape and the iron surface of said press iron is formed into a flat surface shape, wherein first resilient members support the right and left horizontal plates of said collar iron buck upper surface and second resilient members support the inverse triangular-shaped upper surface of the collar iron buck, the first resilient members having a resilient pressure larger than a resilient pressure of the second resilient members.