A connector assembly has a hollow first connector and a hollow second connector. The first connector has an engaging block. The second connector has an opened connecting end, a guiding groove, a resilient tab cavity, an escaping segment and a resilient tab. The resilient tab cavity is defined in the second connector at a side of the guiding groove opposite to the connecting end and communicates with the guiding groove. The escaping segment is formed on and protrudes from an outer surface of the second connector at a position between the guiding groove and the connecting end of the second connector and is hollow to define an escaping space communicating with the guiding groove. The resilient tab is formed on and protrudes from an inner surface of the resilient tab space and has a free end extending into the guiding groove.