A workpiece holder, measuring device, and a method for executing a measurement by using the workpiece holder. The workpiece holder is configured to hold a workpiece with two opposite arranged workpiece surfaces to be measured in a way that both are accessible by a moveable probe unit and can thus be measured in one setting of the workpiece. For this the workpiece holder comprises a support and a holding body. The holding body has a holding end away from the support with at least one holding surface at which the workpiece is held. In the holding body a free space is formed that adjoins the workpiece surface facing the support when a workpiece is held and makes the workpiece surface accessible for measuring or probing. The accessibility for the probe unit is provided by a transverse channel extending obliquely or orthogonally to the longitudinal axis of the workpiece holder.