This paper presents the results of joining dissimilar aluminium alloy A16061 T6 and pure copper sheets by friction stir welding. The butt-joint configuration was used. The joint appeared good with the bare eye. The macro and micro structures of the interface revealed intermixing of the base metals without material discontinuities. The microhardness across the interface did not show jump near the interface. This confirms the homogeneity of the microstructure across the interface. © IAEME Publication.