Abstract: A signal line socket disposed on a test circuit board for receiving a signal line is disclosed. The signal line socket includes a main body disposed on the test circuit board and having an accommodating space, a first conductive component disposed inside the accommodating space, a second conductive component disposed inside the accommodating space and being opposite to the first conductive component, and a securing element electrically connected to the test circuit board and fixing the first and second conductive components inside the accommodating space of the main body. A clearance is formed between the first and second conductive components for receiving the signal line and allowing the signal line against the first and second conductive components, thereby transmitting a signal from the signal line to the test circuit board through the first and second conductive components and the securing element.