LADDER

摘要

PROBLEM TO BE SOLVED: To enhance easiness of ascent/descent by making a position of a rung indicated clearly even in dim light after lights-out at night. SOLUTION: A ladder has a pair of right and left supports 2 and the plural stepped rungs 3, which are disposed at prescribed intervals in a longitudinal direction of the supports 2 and make the supports 2 coupled to each other. A luminous body 5 is provided in a tread 3A of the rung 3.