Display device and head-up display device

The utility model provides a display device capable of realizing a simpler structure and a head-up display device. A display device is provided with: a plurality of lenses (71-73) which transmit light from a light source (75a) and are arranged in the Z direction; and a lens holder (90) and a lower housing part (60a) having clamping parts (60c, 92) for clamping the plurality of lenses (71-73) from both outer sides along the Z direction. The plurality of lenses (71-73) have a plurality of projections (71c-73c, 71d-73d) which are respectively positioned on the outer peripheral side of the lenses (71-73), extend in the Z direction, and are arranged so as to overlap in a straight line along the Z direction so as to be sandwiched between the sandwiching sections (60c, 92). 本实用新型提供一种能够实现更简单的结构的显示装置及平视显示装置。显示装置具有：多个透镜(71～73)，其透射来自光源(75a)的光，沿着Z方向排列；以及透镜保持架(90)及下壳体部(60a)，其具有从沿着Z方向的两外侧夹持多个透镜(71～73)的夹持部(60c、92)。多个透镜(71～73)具有多个突出部(71c～73c、71d～73d)，其分别位于透镜(71～73)的外周侧，沿Z方向延伸，以被夹持于夹持部(60c、92)之间的方式沿着Z方向以在一直线上重叠的方式排列。