A compound represented by General Formula (I), a tautomer, a stereoisomer, or a pharmaceutically acceptable salt of the compound, or a solvate thereof is used as a voltage-dependent T-type calcium channel inhibitor,in the formula,A represents a benzene ring which may have a substituent or the like；B represents a hetero-fused ring consisting of a 5- or 6-membered heteroaryl ring having one to three same or different heteroatoms selected from an oxygen atom, a sulfur atom, and a nitrogen atom, and a carbon atom, as a ring-constituting atom, and a benzene ring, or the like, and the hetero-fused ring may have a substituent, and is bonded to a cyclopropyl group via a carbon atom constituting these rings；R1 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or the like；R2 and R3 may be the same as or different from each other, and each represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or the like, or R2 and R3 together form CH2CH2 or the like；R4 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or the like；m represents 0, 1, or 2； andn represents 0 or 1.
