The problem to be solved by the present invention is to provide a crystal that has good storage stability and non-hygroscopic properties, and that can be obtained with good reproducibility in particular. The present invention provides a crystal of 4-((1-methylpyrrol-2-yl)-carbonyl)-N-(4-(4-morpholin-1-yl-carbonylpiperidine-1-yl)-phenyl)-1-piperazine carboxamide monohydrate.