PROBLEM TO BE SOLVED: To provide a leg bottom support structure implementing a function of adjusting an angle of a leg bottom in a simple configuration, and a bed apparatus.SOLUTION: A leg bottom support structure 90 includes a stay 70 for adjusting an angle of a leg bottom 25, and a support member 80 for support the stay. The stay is integrally formed of: a pair of rotation support parts 71 for rotatably supporting the leg bottom; a pair of operation parts 72 extending, with their individually continued from the pair of rotation support parts; a pair of support object parts 73 individually continued from the pair of operation parts and supported by the support member; and a connection part 76 extending between the pair of support object parts and, both ends of which are individually connected to the pair of support object parts.SELECTED DRAWING: Figure 10【課題】簡易な構成で足ボトムの角度調節機能を実現する足ボトムの支持構造および寝台装置を提供する。【解決手段】足ボトム支持構造90は、足ボトム25の角度を調節するためのステー70と、該ステーを支持する支持部材80と、を備える。ステーは、足ボトムを回転自在に支持する一対の回転支持部71と、一対の回転支持部に各別に連なって延びる一対の操作部72と、一対の操作部に各別に連なり、支持部材に支持される一対の被支持部73と、一対の被支持部の間に延在し、両端が一対の被支持部に各別に連なる連結部76と、が一体に形成されている。【選択図】図10