To provide a dental handpiece device that can suppress a case where a drilled face is in a blind spot, and thus cannot be observed, this dental handpiece device includes: a dental handpiece main body； and a dental handpiece imaging device with which the dental handpiece main body is equipped, wherein the dental handpiece imaging device includes: a plurality of camera modules each of which takes an image, to convert the image, which is taken, to an electric signal； and a processing means that receives the electric signal from each of the camera modules, to calculate for generating an image based on the electric signal, and to switch a display of the image, which is taken by each of the camera modules.
