Most of the currently developed exoskeletons are design to use during singular activity or in just one out of the main positions for rehabilitation, which means that only part of the therapy can be supported by one device and the rest of it must either be a traditional one or involve other devices. Hence comes the need for a single robot to support multiple rehabilitation positions. The goal of this research was to create a frame that would allow for the exoskeleton to aid in both seated and laying positions during multiple stages of recovery and most exercises possible. Using an exoskeleton from a polish research institute as an exemplary one and following anthropometrical criteria, a series of designs were explored with a significant focus on modularity and enabling multiple positions. All other tested approaches to the frame’s design were described in the article. FEM analysis of the final one was additionally conducted to ensure its durability.