A nasal cavity expander includes a support rod, an upper nose plate and a lower nasal plate. The lower nasal plate is fixed to the bottom end of the support rod, and protrudes to abut the lower end of the lower edge of the nostril； the upper nasal plate is slidably connected to the support rod, and protrudes to abut the upper edge of the nostril On the end. The upper nose plate can be displaced up and down along the support rod to adjust the distance between the upper nasal plate and the lower nasal plate, thereby expanding and expanding the nasal cavity, and the upper nasal plate can be positioned on the support rod after the selected position.一種鼻腔擴大器，包括有一支撐桿、一上鼻板及一下鼻板。下鼻板固定於支撐桿之底端，且伸出一用以抵撐鼻孔下緣之下抵端；上鼻板可滑動地連接於支撐桿，且伸出一用以抵撐鼻孔上緣之上抵端。上鼻板可沿支撐桿上、下位移以調整上鼻板與下鼻板之間的距離，藉此撐開並擴大鼻腔，且上鼻板可於選定位置後定位於支撐桿上。
