The present invention creates an azaindole derivative having DP receptor antagonistic activity and a pharmaceutical composition comprising the said compound as an active ingredient, and further providing a therapeutic agent for treating allergic diseases.A compound of the general formula (I) wherein the ring A is an aromatic carbocyclic ring etc.; the ring B is a 3- to 8-membered nitrogen-containing non-aromatic heterocyclic ring etc.; the formula of —X1═X2—X3═X4— is a formula of —C(R1)═C(R2)—C(R3)═N— etc.; R1, R2, R3, R4 and R5 are independently a hydrogen atom or a halogen atom etc.; R6 is optionally substituted C1-C6 alkyloxy etc.; R7 is independently a halogen atom etc.; R8 is optionally substituted C1-C6 alkyl etc.; R9 is carboxy etc.; M is sulfonyl etc.; Y is a single bond etc.; L1, L2 and L3 are a single bond or alkylene optionally containing one or two heteroatoms etc.; n is 0 etc.; q is 0 etc.; a pharmaceutically acceptable salt or hydrate thereof.