of the injection molded plastic used to manufacture the supporter 230 that is the amount of injection molded plastic of the supporter 230 may be reduced by having a relatively thinner thickness of the portion except the reinforcing rib 236 here the coupling ribs 233 are respectively disposed at the first and second side surfaces 230 a 230 b in parallel however the coupling ribs 233 may also be disposed perpendicular to the first and second side surfaces 230 a 230 b this is because a shape of the coupling rib 233 is determined by a shape of the rib of the washing drying machine 100 coupled to the coupling rib 233 hereinafter description of a base of the washing drying machine 100 coupled to the coupling ribs 233 will be given in detail fig5 is an exploded perspective view showing a base mounted at the washing drying machine in fig2 fig6 is a perspective view showing a state that the base in fig5 is coupled to the supporter and fig7 is a perspective view showing another exemplary base in fig5 referring to fig5 height adjustable legs 121 are respectively mounted at four corners of a base 120 and base ribs 122 are respectively formed at both sides of the leg 121 the base ribs 122 include coupling holes 123 to be communicated with the coupling holes 234 at the coupling ribs 233 of the supporter 230 in order for the washing drying machine 100 to be mounted at the pedestal 200 the supporter 230 is disposed between the washing drying machine 100 and the pedestal 200.