Provision of crystal of 1-(4-methoxybutyl)-N-(2-methylpropyl)-N-[(3S,5R)-5-(morpholin-4-ylcarbonyl)piperidin-3-yl]-1H-benzimidazole-2-carboxamide hydrochloride which has a superior rennin inhibitory activity and is useful as a prophylactic or therapeutic agent for hypertension and various organ disorders caused by hypertension, and the like. Crystal of 1-(4-methoxybutyl)-N-(2-methylpropyl)-N-[(3S,5R)-5-(morpholin-4-ylcarbonyl)piperidin-3-yl]-1H-benzimidazole-2-carboxamide hydrochloride having an X-ray powder diffraction pattern showing characteristic peaks at interplanar spacings (d) of around 26.43±0.2, 7.62±0.2 and 4.32±0.2 angstroms.