The present invention provides a solid preparation containing 2[[6-[(3R)-3-amino-1 -piperidinyl]-3,4-dihydro-3-methyl-2,4-dioxo-1(2H)-pyrimidinyl]methyl]-4-fluorobenzonitrile (compound (A)) or a salt thereof as a pharmaceutically active ingredient. Specifically, the present invention provides a solid preparation containing a granule composed of compound (A) or a salt thereof and an additive (excluding microcrystalline cellulose) and a tablet containing (a) a granule containing compound (A) or a salt thereof and microcrystalline cellulose, and (b) a tableting aid containing magnesium stearate and microcrystalline cellulose.