The invention provides a nasal irrigator and a nasal irrigation device, and belongs to the field of nasal irrigation. The nasal irrigator comprises a shell, a medicine storage device, a conveying device, a spraying device and a rotating device, wherein the shell comprises a mounting cavity and an opening, and the opening is communicated with the mounting cavity; the medicine storage device, the conveying device, the rotating device and the spraying device are mounted on the shell respectively; the medicine storage device, the conveying device, the rotating device and the spraying device are positioned inside the mounting cavity respectively; the medicine storage device is connected with the input end of the conveying device; the output end of the conveying device is communicated with the spraying device; the output end of the spraying device extends out of the shell from the position of the opening; the rotating device is used for driving and connecting the spraying device; the rotating device enables the spraying device to rotate relative to the shell. The nasal irrigation device comprises the nasal irrigator. The spraying device of the nasal irrigator provided by the invention can rotate while spraying medicine liquid, and the medicine liquid can be sprayed inside the nasal cavity more uniformly, so that effective cleaning for the nasal cavity is reached, and a rotating spray head can also enable the nasal cavity to be more comfortable.