A scanning image displayer, comprising: a beam provider configured to emit a laser beam; a beam scanner comprising a minute two-dimensional drive deflecting mirror, configured to deflectively scan the laser beam emitted from the beam provider in a main scanning direction and a sub-scanning direction; and a prism (18; 20;) comprising a reflection surface before the two-dimensional drive deflecting mirror, configured to totally reflect the laser beam emitted from the beam provider that enters the prism, the laser beam being reflected in a direction of the two-dimensional drive deflecting mirror such that the laser beam obliquely enters a mirror of the two-dimensional drive deflecting mirror, the two-dimensional drive deflecting mirror deflectively scans the laser beam emitted from the beam provider to project the laser beam onto a surface to be projected, and the light intensity of the laser beam is controlled in accordance with image information to form an image, a flat surface of a substrate on which the mirror of the two-dimensional drive deflecting mirror is formed is located parallel to an optical axis of the laser beam emitted from the beam provider, and the reflection surface is located so as not to receive the laser beam deflectively scanned by the two-dimensional drive deflecting mirror, characterized in that: the prism is configured such that the laser beam deflected by the two-dimensional drive deflecting mirror passes through the prism, and a surface of the prism, through which the laser beam deflected by the two-dimensional drive deflecting mirror is emitted, has the shape of a convex lens. a beam provider configured to emit a laser beam; a beam scanner comprising a minute two-dimensional drive deflecting mirror, configured to deflectively scan the laser beam emitted from the beam provider in a main scanning direction and a sub-scanning direction; and a prism (18; 20;) comprising a reflection surface before the two-dimensional drive deflecting mirror, configured to totally reflect the laser beam emitted from the beam provider that enters the prism, the laser beam being reflected in a direction of the two-dimensional drive deflecting mirror such that the laser beam obliquely enters a mirror of the two-dimensional drive deflecting mirror, the two-dimensional drive deflecting mirror deflectively scans the laser beam emitted from the beam provider to project the laser beam onto a surface to be projected, and the light intensity of the laser beam is controlled in accordance with image information to form an image, a flat surface of a substrate on which the mirror of the two-dimensional drive deflecting mirror is formed is located parallel to an optical axis of the laser beam emitted from the beam provider, and the reflection surface is located so as not to receive the laser beam deflectively scanned by the two-dimensional drive deflecting mirror, characterized in that: the prism is configured such that the laser beam deflected by the two-dimensional drive deflecting mirror passes through the prism, and a surface of the prism, through which the laser beam deflected by the two-dimensional drive deflecting mirror is emitted, has the shape of a convex lens. the prism is configured such that the laser beam deflected by the two-dimensional drive deflecting mirror passes through the prism, and a surface of the prism, through which the laser beam deflected by the two-dimensional drive deflecting mirror is emitted, has the shape of a convex lens.