Virtual image display apparatus and optical unit

A virtual image display apparatus, comprising:

• a display element configured to emit an image light;
• a first prism on which the image light from the display element is incident;
• a second prism joined to the first prism to constitute a prism-based light guide member having a parallel flat plate shape;
• an inclined mirror portion disposed at a joining portion between the first prism and the second prism and configured to reflect at least a part of the image light guided in the first prism;
• a lens having positive power and disposed so as to face an outer side surface of the first prism on which the image light reflected by the inclined mirror portion is incident;
• and
• a transmissive mirror formed at an external side of the lens and configured to partially reflect, toward the inclined mirror portion, the image light reflected by the inclined mirror portion, wherein
• the inclined mirror portion is formed so as to correspond to a partial area from which peripheries of inclined surfaces of the first prism and the second prism are excluded.