AN OBJECT OF THE PRESENT INVENTION IS TO PROVIDE A STAT3/5 ACTIVATION INHIBITOR. THE PRESENT INVENTION PROVIDES A STAT3/5 ACTIVATION INHIBITOR CONTAINING AN AROMATIC COMPOUND REPRESENTED BY THE GENERAL FORMULA OR A SALT THEREOF AS AN ACTIVE INGREDIENT: WHEREIN X₁ REPRESENTS A NITROGEN ATOM OR A GROUP -CH=, R₁ REPRESENTS A GROUP -Z-R⁶, IN WHICH Z REPRESENTS A GROUP -CO-, A GROUP -CH(OH)- OR THE LIKE, R6 REPRESENTS A 5-TO 15-MEMBERED MONOCYCLIC, DICYCLIC OR TRICYCLIC SATURATED OR UNSATURATED HETEROCYCLIC GROUP HAVING 1 TO 4 NITROGEN ATOMS, OXYGEN ATOMS OR SULFUR ATOMS, R² REPRESENTS A HYDROGEN ATOM OR A HALOGEN ATOM, Y REPRESENTS A GROUP -C-, A GROUP -CO-, A GROUP -CH(OH)- OR A LOWER ALKYLENE GROUP, AND A REPRESENTS A GROUP WHEREIN R³ REPRESENTS A HYDROGEN ATOM, A LOWER ALKOXY GROUP OR THE LIKE, P REPRESENTS 1 OR 2, R⁴ REPRESENTS AN IMIDAZOLYL LOWER ALKYL GROUP OR THE LIKE.
