To reliably support insertion of an endoscope to a target region by reliably and easily giving information of a branch position which requires special attention.

By operating a setting information input part, a quasi caution point is designated before/after a branch point requiring caution in the case of insertion using a pointer 547 in this quasi caution point adding window 546 to display a quasi caution point marker 548d. By clicking an OK button 549, the quasi caution point is added.