Adapter assembly and connector assembly

An adapter assembly used for connecting a plurality of connectors comprises a plurality of adapters and at least a joining device. Each adapter comprises a shell body, wherein at least a pair of ports used for insertion of the connectors are formed in the shell body; and adjacent walls of the ports of two adjacent adapters among the adapters are connected through each joining device in a clamping and matched mode, so the adapters are fixed together. Due to the fact that the adapters can be sequentially jointed side by side in the horizontal direction or sequentially jointed in the vertical direction in an overlaid mode, space on installation panels can be made use of in a greatest degree.