To provide a solid food composition such as a food bar containing insoluble dietary fibers, which prevents powders and/or ingredients from scattering when folded into bite-size pieces or chewed at eating.;A solid food product composition comprising insoluble dietary fibers, satisfying the following (1) to (7) :(1) the composition comprises edible part and/or non-edible part of one or more foodstuffs containing insoluble dietary fibers, wherein a content of the foodstuff is 5% by mass or more and 95% by mass or less in terms of total dry mass;(2) a content of insoluble dietary fibers is 1% by mass or more;(3) a sugar content is 10% by mass or more and 75% by mass or less;(4) a moisture content is 20% by mass or less;(5) 50% cumulative particle diameter after ultrasonication is more than 15 µm and 500 µm or less;(6) 90% cumulative particle diameter after ultrasonication is 50 µm or more and 1,000 µm or less;(7) a minimum particle diameter after ultrasonication is 4 µm or less.
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