The recombination of I atoms in the presence of NO was studied by laser flash photolysis in the inert gas He, at pressures between 1 and 200 atm and at temps. from 320-440 DegK. The elementary steps of the complex mechanism of the recombination were resolved. The fall-off curve of the interaction I + NO + He -> INO + He was measured as well as the equil. const. for I + NO .tautm. INO. The bond energy of INO is DH00 = 23 +- 3 kcal mole-1.