A sound post, in particular for stringed instruments, and a sound post assembly set. The sound post is composed of at least two sound post components and has end pieces which can be pivoted at the end faces of the sound post. The second sound post component has a threaded portion, and the first sound post component has an inner thread which corresponds to the threaded portion such that the sound post components can be screwed together and thus adjusted vertically or longitudinally relative to each other. The threaded portion has a fine thread. Furthermore, a scale with an equidistant graduation is arranged on one of the at least two sound post components. The graduation of the scale corresponds to the pitch of the fine thread.