A foldable wheelchair with convenient headrest assembly and disassembly, comprising two chair frames, a folding unit, a cushion, two armrests, a back cushion, two main wheels, two interlocking wheels and a headrest unit. The chair frame has a chair back rod , The top of the chair back rod is bent with a push handle and an insertion part located at the middle section of the push handle. The headrest unit has a headrest crossbar and a headrest main body connected to the headrest crossbar. Both ends of the headrest crossbar are respectively provided with a positioning seat clamped on the push handle, and a positioning seat at the positioning A positioning rod inserted in the insertion part is used in the middle of the seat. In this way, the headrest unit is installed on the wheelchair body, in addition to providing the headrest for the wheelchair user to lean on, it can also stably support the two chair frames, so that the wheelchair structure in use is more solid and stable without shaking.一種方便裝卸頭枕的折合式輪椅，包含二椅架、一折合單元、一座墊、二扶手、一背墊、二主輪、二連動輪及一頭枕單元，該椅架具有一椅背桿，該椅背桿頂部彎設有一推把及一位於該推把中段位置上的插置部。該頭枕單元，具有一頭枕橫桿，及一連結於頭枕橫桿的頭枕主體，該頭枕橫桿兩端分別設有一夾設在該推把上的定位座，及一位於該定位座中間以插設於該插置部的定位桿。藉此，將該頭枕單元裝設於輪椅主體上，除了提供頭枕給輪椅使用者所倚靠，還能穩定支撐兩椅架，讓使用狀態的輪椅結構更紮實穩固且不晃動。
