<;P>;PROBLEM TO BE SOLVED: To obtain a new medicine for preventing or treating a nerve disorder after a disease recovery by inhibiting formation of a glial scar. <;P>;SOLUTION: The medicine for preventing or treating a nerve disorder comprises a compound or its salt that inhibits activity of a protein having an amino acid sequence equal to or substantially equal to an amino acid sequence described in sequence number 2, its partial peptide or its salt. <;P>;COPYRIGHT: (C)2007,JPO&INPIT