The paper offers a discussion of the concept of common sense in T. Reid's philosophy. Reid criticizes Hume's scepticism, which is in conflict with common sense, as a 'deadlock of philosophy'. Reid's criticism thus might be seen as naive and 'un-philosophical', and therefore missing the point. The author argues, however, that common sense, as used by Reid, is a metaphysical concept. In his view common sense and its principles delimit all plausible philosophizing. He also sees a remarkable affinity between Reid's philosophy and later Wittgenstein's considerations of 'the image of the world'. Reid's philosophy of common sense is an original philosophical resolution of the problem, which the philosophy 'in a deadlock' is facing, as well as an effective criticism of scepticism.