The purpose of the present research is to develop a visual-spatial ability test (VSAT) for primary school children. Visual-spatial abilities allow processing of information about an object in terms of shape, colour, texture, perspective, and rotation. The visual-spatial test includes items-tasks for the participants to process information about texture, colour, shape and perspective. A total of 196 primary school children participated in the research. The data were analysed through Rasch analysis and item-response theory. Findings proved that VSAT yields reliable and valid results for assessing the visual-spatial ability of primary school children.