  Mennicke--Newman lemma for unimodular rows was used by W. van der Kallen to
give a group structure on the orbit set $\frac{Um_{n}(R)}{E_{n}(R)}$ for a
commutative noetherian ring of dimension $d\leq 2n-4.$ In this paper, we
generalise the Mennicke--Newman lemma for $m\times n $ right invertible
matrices.
