Display device and interior member unit

An objective of the invention is to provide a display device which can properly project images to an interior member of a vehicle, and an interior member unit. The display device (1) applied to an instrument panel unit (100) includes: a projection surface (2) provided on a surface on a vehicle interior side (IN) of an interior member (101) provided on the vehicle interior side (IN) of a vehicle and on a front side in a vehicle front-back direction (X), the interior member extending along a vehicle width direction; a projector (3) including a projection unit (34) configured to project an image;and a holding unit (4) configured to hold the projector by the interior member (101) in a positional relationship where at least a part of the projection unit is located on the projection surface side (2) of the interior member (101), and the image from the projection unit (34) is projected onto the projection surface (2). 本发明的目的是提供能够向车辆的内装部件恰当地投影图像的显示装置以及内装部件单元。适用于仪表板单元(100)的显示装置(1)的特征在于，包含：投影面(2)，被设置在内装部件(101)的车厢内侧(IN)