To provide a hedgehog signal inhibitor or the like which contains as an effective ingredient, a condensed heterocyclic derivative or a pharmacologically acceptable salt thereof.

There is provided a hedgehog signal inhibitor or the like which contains as the effective ingredient, a condensed heterocyclic derivative represented by general formula (I) [wherein R¹ is hydrogen or the like; R² is hydrogen or the like; R³ is lower alkyl which may have a substituent, or the like; A is cycloalkyl which may have a substituent, or the like; B is 5- or 6-membered non-aromatic carbon ring which may have a substituent together with adjacent pyrrole ring of -C=C-, or the like; L¹ is formula (i) or the like; L² is formula (iii) (R⁴ is hydrogen or the like), formula (iv) or the like, and when L2 is formula (iv), Q does not exist, and when L² is formula (iii), Q does not exist or is an oxygen atom], or a pharmacologically acceptable salt thereof.