It is an object of the invention to provide a novel octahydronaphthalene derivative with an activity of inhibiting ICAM-4 expression and a pharmaceutically acceptable salt thereof. The invention encompasses, for example, agents for suppressing ICAM-1, therapeutic agents for inflammatory diseases, therapeutic agents for rheumatoid arthritis, immunosuppressive agents, and agents for suppressing cell growth, comprising N-(pyridin-3-ylmethyl)-(2E,4E)-5-[(1S,2S,4aR,6R,7S,8S,8aS)-7-hydroxy-2,6,8-trimethyl-1,2,4a,5,6,7,8,8a-octahydronaphthalen-1-yl]-2-methylpenta-2,4-dienamide as an active ingredient.