Communication system via chaotic modulations is demonstrated. Itcontains the well-known chaotic circuits as its basic elements - Chua'scircuits. The proposed system has some standard properties of spreadspectrum communication. The following advantage is found insimulations: a) Transmitted signals have broad spectra. b) Securecommunications are possible in the sense that the better parametermatching is required in order to recover the signal. c) The circuitstructure of the communication system is most simple and communicationsystems are easily built at a small outlay. Finally computersimulations are given to examine the validity of this system.