A novel use of a specific bicyclic nitrogen-containing heterocyclic compound as a PDE7 inhibitor, and a novel bicyclic nitrogen-containing heterocyclic compound having a PDE7 inhibitory activity or a pharmaceutically acceptable salt thereof as an active ingredient Providing a pharmaceutical composition. A PDE7 inhibitor comprising a compound having a specific chemical structure represented by formula (II) or a pharmacologically acceptable salt thereof as an active ingredient. [RII is H, etc .； LII is a single bond, etc .； CyII is substituted / unsubstituted aryl, heteroaryl, alicyclic hydrocarbon group, non-aromatic heterocycle, etc.] [Selection] None【課題】特定の二環式含窒素複素環化合物のＰＤＥ７阻害剤としての新規用途、並びにＰＤＥ７阻害作用を有する新規二環式含窒素複素環化合物又はその薬理的に許容し得る塩を有効成分とする医薬組成物の提供。【解決手段】式（ＩＩ）で代表される特定の化学構造を有する化合物又はその薬理的に許容し得る塩を有効成分とするＰＤＥ７阻害剤。［ＲＩＩはＨ等；ＬＩＩは単結合等；ＣｙＩＩは、置換／非置換のアリール、ヘテロアリール、脂環式炭化水素基、非芳香族へテロサイクル等］【選択図】なし
