An imaging device comprising: an imaging unit having an imaging part configured to image a subject, and a holder configured to hold the imaging part at one end thereof; a housing including a recess part formed in a first surface thereof, and configured to house the imaging unit; and a hinge device having a hinge member housed in the recess part pivotally coupled to the housing around an axle extending approximately in parallel with the first surface inside the recess part of the housing, wherein the imaging unit pivots around the axle via the hinge device between a housing position at which the imaging unit is housed inside the recess part of the housing and a projecting position at which the imaging unit is projected from the recess part of the housing, wherein the imaging part includes an imaging element having an approximately rectangular shape, a lens configured to introduce external light into the imaging element, and a lens hood mounted at an outer periphery of the lens, and wherein the lens hood projects from a surface of the lens by a distance to allow the imaging part to introduce light necessary for imaging a subject from the lens into the imaging element and to block unnecessary light introduced from the lens into the imaging element, characterized in that the lens hood includes an opening part to expose the surface of the lens when the lens is fit into the lens hood, and at least three protruding objects are mounted at equal intervals on an outer periphery of the opening part, the at least three protruding objects being arranged to position the lens at the center of the lens head. an imaging unit having an imaging part configured to image a subject, and a holder configured to hold the imaging part at one end thereof; a housing including a recess part formed in a first surface thereof, and configured to house the imaging unit; and a hinge device having a hinge member housed in the recess part pivotally coupled to the housing around an axle extending approximately in parallel with the first surface inside the recess part of the housing, wherein the imaging unit pivots around the axle via the hinge device between a housing position at which the imaging unit is housed inside the recess part of the housing and a projecting position at which the imaging unit is projected from the recess part of the housing, wherein the imaging part includes an imaging element having an approximately rectangular shape, a lens configured to introduce external light into the imaging element, and a lens hood mounted at an outer periphery of the lens, and wherein the lens hood projects from a surface of the lens by a distance to allow the imaging part to introduce light necessary for imaging a subject from the lens into the imaging element and to block unnecessary light introduced from the lens into the imaging element, characterized in that the lens hood includes an opening part to expose the surface of the lens when the lens is fit into the lens hood, and at least three protruding objects are mounted at equal intervals on an outer periphery of the opening part, the at least three protruding objects being arranged to position the lens at the center of the lens head.