An accident prevention structure of wires for apartment house is provided to interrupt a leaking power line selectively when the leakage occurs in the power line from a main circuit breaker to a circuit breaker of each house. An accident prevention structure of wires for apartment house comprises a wiring connection unit. In the wiring connection unit, a branch pipe has a number of output pipes(112) connected to one input pipe(11) and the input pipe or the output pipe has the shape of a fringe pipe(P). An input port is embedded in an input stage of the input pipe. A plurality of output ports is connected to the input port of the input pipe by being embedded in an output stage of each output pipe. A plurality of circuit breaker units interrupts power supply from the input port to each output port. A plurality of electric leakage sensors senses electric leakage from the circuit breaker unit to each output port. A plurality of light emission units(160) is revealed to the outside of each output pipe. A control unit controls the operation of the corresponding circuit breaker unit and the light emission unit individually by receiving a sensing signal from each electric leakage sensor.