This paper reviews the existing and state of art knowledge for PCBs recycling in order to recover the base (Fe, Cu, Al, Sn etc.) and valuable (Au, Ag etc.) metals and nonmetals (resins, glassfiber, ceramics, BFRs etc.) with and without electronic components. PCBs constitute about 3% of the total electronic waste and contain 30% metals and 70 % nonmetals. Therefore; they are respected as both polimetallic secondary source and potentially toxic waste due to Pb, Hg, Cd, Cr and BFR contents if improperly managed or recycled. This paper classifies and characterises waste PCBs; describes PCB structures; electronic components joinings; manual and automated dismantling techniques; communition by shredding and pulverizing for liberation; physical separation methods (gravity, magnetic and electrostatic); metallurgical processing (pyrometallurgy, hydrometallurgy and biohydrometallurgy) and purification processes. PCB selective manual dismantling, physical separation and hydrometallurgical extraction results in laboratory scale will also be presented along with a flowsheet.