PROBLEM TO BE SOLVED: To provide a compound imparting a scent of a woody-floral tone useful as a perfume and having an orris-like rich sweetness, having a high lasting effect, and capable, when blended with other perfumes, of emphasizing the floral sweetness and a perfume composition including the compound.SOLUTION: The provided nitrile compound is expressed by the formula (I): [Chemical 1]: [in the formula, one of bonds between C-3 and C-2 and between C-2 and C-1 expresses a double bond together with dotted lines one of bonds between C-4 and C-3 and between C-3 and C-2 expresses a double bond together with dotted lines or both bonds between C-4 and C-3 and between C-3 and C-2 express single bonds].
