  Neutron-proton (np-) pairing is expected to play an important role in the N Z
nuclei. In general, it can have isovector and isoscalar character. The
existence of isovector np-pairing is well established. On the contrary, it is
still debated whether there is an isoscalar np-pairing. The review of the
situation with these two types of pairing with special emphasis on the
isoscalar one is presented. It is concluded that there are no substantial
evidences for the existence of isoscalar np-pairing.
