Technologies are generally described for a marking gauge. In some examples, the marking gauge includes a scribing bar and a marking pin disposed at a fixed location in the scribing bar. A bolt may extend through a stock and the scribing bar. A nut may be in contact with the scribing bar and engaged with the bolt. The nut and the bolt may be effective to fasten the stock to the scribing bar. The scribing bar may include walls defining a longitudinally extending slot and the mortise pin may extend through the longitudinally extending slot. A pointed end of the mortise pin and of the marking pin may be adjustable with respect to the scribing bar.