Fitting tool and fitting-tool-equipped bag body

A fitting tool comprising:

• a male side fitting member in which a male side fitting portion is provided on a surface of a band-shaped first base material along a longitudinal direction;
• and
• a female side fitting member in which a female side fitting portion is provided on a surface of a band-shaped second base material along the longitudinal direction,
• wherein the male side fitting portion and the female side fitting portion are detachably fit,
• each of the first base material and the second base material includes a main layer, a seal layer provided on a side of the main layer opposite the male side fitting portion and the female side fitting portion, and an interlayer provided between the main layer and the seal layer, and
• each of the first base material and the second base material satisfies the following conditions (1) to (3),
• (1) the main layer, the interlayer, and the seal layer contain at least one kind of same type of resin,
• (2) a melting point TA (° C.) of the main layer, a melting point TB (° C.) of the interlayer, and a melting point TC (° C.) of the seal layer satisfy a relationship of TB>TA>TC (the melting point TA, in a case where the main layer is formed of a plurality of resins, is a lowest melting point among melting points of the resins, and the same applies to the melting point TB and the melting point TC),
• (3) a thickness tA (μm) of the main layer, a thickness tB (μm) of the interlayer, and a thickness tC of the seal layer satisfy a relationship of tB>tA>tC.