New conductive soluble oligo(p-phenylene), oligo(thiophene), oligo(p-phenylene-thiophene) (4 : 1) (1 : 1) (1 : 4), oligo(p-phenylene-sulphide), oligo(p-phenylene-selenide), oligo(p-diphenylene-sulphide) and oligo(p-diphenylene selenide) were synthesized. Structural, optical and electrical characteristics of these oligomers have been determined. The optical and electrical properties are dependent on the oligomers＇ structures. The conductivities of these oligomers are low, between 10(-4) and 10(-12) S m(-1). However, there is an increase after doping them with iodine. These soluble oligomers can be used for production of active components in opto-electronic devices.