The region surrounding the nucleus of 3C 120 has been recorded on electronographic plates, in U, B, V and V' colours. It has been possible to substract the contributions of the bright nucleus and the galaxy. Faint condensations appear. Their colours show that they are probably not emitting synchrotron radiation. The brightest condensation A is located 4” West of the nucleus. It does not coïncide exactly with the knot of the radio jet and is very slightly displaced toward the North. It is probably of the same nature as Minkowski's Object: burst of star formation triggered by the collision of the jet with relatively dense extranuclear gas.