The present invention provides a nasal dilator including: two intranasal stents (1) and a connecting band (2), wherein each of two ends of the connecting band (2) being symmetrically connected to one intranasal stent (1), each intranasal stent (1) having an elastic band-shape structure, each intranasal stent (1) has a straight-line shape, an arc-line shape, a bow shape, or a fold-line shape in a cross section perpendicular to a width direction of the elastic banded structure, each intranasal stent (1), along a length direction of the elastic band-shape structure, comprises: a nasal septum supporting section (3), a bending section (4), and a nasal alar dilating section (5), each intranasal stent (1) has a generally C-shape in a cross-section perpendicular to a central axis of nasal passages, wherein an opening of the C-shape faces towards a nasal base (11).