This report aims to suggest a metrical model which measures escapability from a maze by taking human behavior of choosing routes into consideration, and to find a clue to the location planning of fire escape according to the types of escape routes. By applying this model to three different kinds of mazes, it is ascertained that this model serves the following purposes. 1. To measure an escapability from a maze. 2. To compare metrically escapabilities of various kinds of mazes. 3. To know the most escapable arrangement of goal points in a maze. This model will be helpful for planning safe arrangement of fire escapes.