A virtual image display device configured to present a virtual image to a user comprising: a virtual image presentation plate (22, 62) having a uniform thickness (t), a display unit configured to generate an image display light; and a projection optical system configured to project the image display light toward the virtual image presentation plate, wherein the projection optical system includes a first concave mirror configured to reflect the image display light toward the virtual image presentation plate and a second concave mirror configured to reflect the image display light toward the first concave mirror, defining a plane along both a direction of incidence and a direction of output of the image display light on the virtual image presentation plate as a reference plane, the first concave mirror is oriented such that the image display light is incident on the first concave mirror in a direction along the reference plane, and the second concave mirror is oriented such that the image display light is incident on the second concave mirror in a direction intersecting the reference plane, and the display unit is provided at a focal point of a composite optical system within a meridional plane, the composite optical system being formed by the virtual image presentation plate and the projection optical system, and the focal point of the composite optical system within the meridional plane is a position of convergence of parallel beams assumed to be incident from the user toward the virtual image presentation plate along the meridional plane of the virtual image presentation plate, wherein the projection optical system further includes a plane parallel plate provided at an angle to a light path of the projection optical system, the plane parallel plate includes a rotational axis, a direction of the rotational axis of the plane parallel plate is configured to be orthogonal to the meridional plane of the projection optical system, the composite optical system is configured to have astigmatism due to a difference between the focal point of the composite optical system within the meridional plane and a focal point of the composite optical system within the sagittal plane, and the focal point of the composite optical system within the sagittal plane is a position of convergence of parallel beams assumed to be incident from the user toward the virtual image presentation plate along the sagittal plane of the virtual image presentation plate. a virtual image presentation plate (22, 62) having a uniform thickness (t), a display unit configured to generate an image display light; and a projection optical system configured to project the image display light toward the virtual image presentation plate, wherein the projection optical system includes a first concave mirror configured to reflect the image display light toward the virtual image presentation plate and a second concave mirror configured to reflect the image display light toward the first concave mirror, defining a plane along both a direction of incidence and a direction of output of the image display light on the virtual image presentation plate as a reference plane, the first concave mirror is oriented such that the image display light is incident on the first concave mirror in a direction along the reference plane, and the second concave mirror is oriented such that the image display light is incident on the second concave mirror in a direction intersecting the reference plane, and the display unit is provided at a focal point of a composite optical system within a meridional plane, the composite optical system being formed by the virtual image presentation plate and the projection optical system, and the focal point of the composite optical system within the meridional plane is a position of convergence of parallel beams assumed to be incident from the user toward the virtual image presentation plate along the meridional plane of the virtual image presentation plate, wherein the projection optical system further includes a plane parallel plate provided at an angle to a light path of the projection optical system, the plane parallel plate includes a rotational axis, a direction of the rotational axis of the plane parallel plate is configured to be orthogonal to the meridional plane of the projection optical system, the composite optical system is configured to have astigmatism due to a difference between the focal point of the composite optical system within the meridional plane and a focal point of the composite optical system within the sagittal plane, and the focal point of the composite optical system within the sagittal plane is a position of convergence of parallel beams assumed to be incident from the user toward the virtual image presentation plate along the sagittal plane of the virtual image presentation plate.