To provide a holder for keeping a string in a tightened and tied state and solving such a problem that, when an object is tied with a string, even if the wound string is tied, it is somewhat loosened, in a case of a moving object such as a shoe, the string is further loosened, and sometime the tied string is untied.

A support for tying a string comprises two plates (a) and (b) with a necessary size in which two holes with sizes necessary for passing and catching the string are bored at necessary intervals respectively, where the interval of the holes on the plate (b) is deviated from the interval of the holes of the plate (a) for an amount of compressing the string, with the holes of the plate (b) overlappedly opened inward or outward the holes of the plate (a). The string is passed therethrough and the plates are closely tightened so as to produce an effect of clamping and pressing the string. An assistive tool for tying the string can thus firmly tie an object to be tied without any loosening.