Disclosed is a viewfinder apparatus for a camera, comprising: a curvilinear image-forming surface in a viewfinder optical system independent of a photographic optical system; a field frame disposed adjacent to the image-forming surface for defining a reference field of view, the field frame being formed into a curvilinear shape such as to match in profile with the image-forming surface; a field-correcting frame for correcting the field of view defined by the field frame, the field-correcting frame being supported on an arm portion that is pivoted about a revolving shaft in a direction normal to an optical axis of the viewfinder optical system, the field-correcting frame being formed into a curvilinear shape such as to correspond in profile with the image-forming surface; and a motor for driving the field-correcting frame into movement along the image-forming surface, whereby the field-correcting frame of the viewfinder optical system is invariably viewed.