To provide a ladder for evacuation which is light in weight, is easy to operate and maintain, has the number of components reduced thoroughly, and is safely usable, as a ladder to be used by being mounted on a hatch for evacuation.

The ladder for evacuation is formed by piling up a plurality of ladder members in the same shape formed of a pair of right and left column materials and a horizontal beam mounted on a horizontal beam attaching portion at the lower end parts of the pair of column material in front and back directions to be freely slidable in the vertical direction. The column material includes: a main column portion in a vertically long plate shape with the horizontal beam attaching portion formed at the lower end part; a side column portion in the vertically long plate shape, connected to the inner side face above the horizontal beam attaching portion of the main column portion, projected to the rear from the main column portion, and inclined to the inner side; an outer side locking portion connected to the outer side of the main column portion for freely slidably locking the column materials piled up at the front and back; and an inner side locking portion connected to the inner side of the side column portion for freely slidably locking the column materials piled up at the front and back.