Abstract: A virtual image display apparatus includes a housing having a first housing part and a second housing part. The first housing part is located on a side facing in a first direction. The second housing part is located on a side facing in a second direction being opposite to the first direction. A composite wall is located at the housing on a side facing in a third direction being perpendicular to the first direction. The composite wall includes a first front wall portion and a second front wall portion. The first front wall portion is extended from the first housing part. The second front wall portion is extended from the second housing part. The first and second front wall portions have an interference avoidance structure that avoids interference when the first and second front wall portions approach each other by receiving a load.

Abstract: A virtual image display device includes a light source, an image member, a Fresnel lens array having an array structure of Fresnel lens units. Each of the Fresnel lens units includes divided lens surfaces that commonly curve convexly or concavely. The array structure includes eccentric Fresnel lens units as the Fresnel lens units. The divided lens surfaces have curvature centers offset from an individual center axis line. Each of the eccentric Fresnel lens units has an offset amount defined as a distance of the curvature centers from the individual center axis line. The offset amount of the eccentric Fresnel lens unit having a larger value of the inter-axis distance between the overall reference axis line and the individual center axis line is greater than the offset amount of the eccentric Fresnel lens unit having a smaller value of the inter-axis distance.