A gas line automatic cut off valve including a gas valve housing adapted to be conveniently coupled between a standard gas line outlet and a standard gas powered appliance; a gas valve situated within the gas valve housing, the gas valve having a first orientation for precluding gas from flowing between the standard gas line outlet and the standard gas powered appliance upon the lack of receipt of an activation signal and further a second orientation for allowing gas to flow between the standard gas line outlet and the standard gas powered appliance upon the receipt of an activation signal; and a gas detector situated above the standard gas powered appliance and electrically connected to the valve, the gas detector adapted to continuously transmit an activation signal upon the detection of gas and further adapted to cease the transmission of the activation signal only upon the depression of a reset button situated on the bottom face thereof.