To provide a reclining floor surface type which can be reclined by a lever being pressed manually and operated without using electric energy and can be used as a mattress of a sleeping mat as well.SOLUTION: A reclining floor surface type reclines in a chain of first operation that pinches a central plate from left and right both sides and moves the central plate forward by using both side grooves, second operation that is linked to the first operation and pushes the plate in contact with a lower part of the body, and third operation that is linked to the second operation and raises a back bottom. With respect to power, a part of the central plate 19 is pinched by a lever body 16 and the lever 12 is pressed by a foot lever 14, so that when grooves 17, 18 on both sides are engaged, the central plate 19 is pushed forward according to a gear principle, and the contact surface is linked and pushed forward, the back bottom is reclined and rises.SELECTED DRAWING: Figure 2【課題】電力エネルギーを使用しないで、レバーを人の力で押して作動するリクライニングを可能とし、敷布団のマットレスに用いることも可能とするリクライニング床面型を提供する。【解決手段】中央の板を左右両側から挟み両方の両側の溝を使って前方へ中央の板を移動させる第1作動、それに連動して下半身部分に当たる板を押し出す第2作動、またそれに連動して背ボトムの板を起こす第3作動の連鎖でリクライニングする。動力について、中央の板19の部分をレバー本体16で挟み、レバー12を足レバー14で押すことで、両側の溝17、18を歯車の原理で中央の板19を前方へ押し出し接触面も連動して前方へ押し出されると、背ボトムがリクライニングされて起き上がる。【選択図】図2