A conching apparatus having: a container, which forms an accommodating space for a product mass, a shaft, which is accommodated, at least in part, in the container and is designed to rotate about its longitudinal axis, and at least one conching tool, which is coupled to the shaft for joint rotation therewith, the conching tool therefore, during conching operation of the conching apparatus, moving in a first direction of circulation along a circulatory path. The conching tool here includes an operative surface, which is directed towards the inner wall of the container and is designed such that a radial gap between the inner wall of the container and the operative surface decreases, at least in part, counter to the first direction of circulation. The invention also relates to a method for conching a product mass.
