The invention proposes a lamp warning device, which is applicable to a lamp tube and a lamp holder. The lamp tube has two pin sets, and the lamp holder has two slot sets matching with the pin sets, including: a shell, which is arranged on the lamp tube. At least one contact group is formed in the shell. A circuit board is arranged in the shell and is electrically connected with the lamp tube by the contact group. A warning unit is electrically connected with the circuit board. When the lamp holder is started, the warning unit will send out a warning to achieve the function of warning.本創作提出一種燈管警示裝置，適用於一燈管及一燈座，該燈管具有二接腳組，該燈座具有二與該等接腳組相配合的插槽組，包含：一殼體，設置於該燈管。至少一接點組，形成於該殼體。一電路板，設置於該殼體中，藉由該接點組與該燈管電連接。一警示單元，與該電路板電連接，當該燈座啟動，該警示單元發出警示，以達到提醒之功效。
