This creation provides a kind of far infrared knee part heating device, includes a shell ontology and an infrared heater. The shell ontology encloses one space of structure and is formed with an opening being connected to the space, the shell ontology includes a top plate, a bottom plate and side plate, the side plate is set between the what top plate and the bottom plate, the side plate includes plural first plate, and each first plate is detachably connectable to enclose the structure space in around arrangement； The infrared heater is set in what shell ontology. Thereby, the characteristic of each first plate tool dismountable, it is possible to provide manufacturer reduces occupied space, inventory and shipment and delivery cost.本創作提供一種遠紅外線足膝部加熱裝置，包含一殼本體及一紅外線加熱器。該殼本體圍構一空間並形成有一與該空間連通之開口，該殼本體包含一頂板、一底板及一側板，該側板設於該頂板與該底板之間，該側板包含複數第一板件，各第一板件可拆卸地相連接呈圍繞排列而圍構該空間；該紅外線加熱器設於殼本體內。藉此，各第一板件具拆卸組合之特性，可提供製造商降低佔用空間、庫存及運送成本。
