To provide a heterocyclic amide compound that has a prolyl-tRNA synthetase (PRS) inhibitory action and is used as a prophylactic or therapeutic agent for PRS associated diseases such as cancer.SOLUTION: The invention provides a compound represented by the formula (I) in the figure or a salt thereof. (Ring A is a substituted/unsubstituted aromatic ring； ring B is a substituted/unsubstituted purine, an imidazopyridine, or a nitrogen-containing 6-membered ring directly coupled with a nitrogen-containing 5-membered ring.)SELECTED DRAWING: None【課題】プロリルｔＲＮＡ合成酵素（ＰＲＳ）阻害作用を有し、癌などのＰＲＳ関連疾患の予防または治療剤として用いられる複素環アミド化合物の提供。【解決手段】式（Ｉ）で表される化合物またはその塩。（環Ａは置換／非置換芳香環、環Ｂは置換／非置換のプリン、イミダゾピリジン又は、含窒素５員環が直結した含窒素６員環）【選択図】なし
