By cyclic voltammetry in alkaline solution investigatied electrochemical and electrocatalytic properties of meso-tetramethyltetraben- zoporphyrin with copper, iron, nickel and cobalt. Influence of change of potentials in area from 0.5 to -1.4 В and speeds of scanning from 10 to 100 mV/s on cyclic I-E-curvcs and redox-transformations of catalysts is studied.