To provide a lower limb rest having a lower limb rest surface freely adjustable in height and length directions.

The lower limb rest includes a lower limb rest portion and the base portion which are connected to each other in a manner to be vertically slid through height-adjusting sections formed of first sliding mechanisms and second sliding mechanisms. The lower limb rest portion includes an upper front member and an upper back member which are connected to each other in a manner to be slid back and forth through a first length-adjusting section formed of a third sliding mechanism and form the lower limb rest surface. The base portion includes a lower front member and a lower back member which are connected to each other in a manner to be slid back and forth through a second length-adjusting section formed of a fourth sliding mechanism.