The utility model discloses a resistor and capacitor adapter which is used for loading resistors or capacitors and comprises a box body, a conductor spring, a loading body and a second connection line, wherein the box body is internally provided with a containing space; the conductor spring is arranged in the containing space of the box body; the end of the conductor spring is also connected with a first connection line which penetrates through the other end of the box body; the other end of the conductor spring is connected with a first contact piece; the loading body can be properly arranged in the containing space and provided with a loading groove; the other end of the loading groove is provided with a second contact piece; two ends of the middle position of the loading groove are respectively provided with a chute; the loading body and the box body interact on each other through a switch lock; and the second connection line penetrates through the other end of the loading body and is connected with the second contact piece. When using the adapter to debug a circuit, the debugging operation can be finished only by placing the resistor or capacitor in the adapter and through the connection between the connection line of the adapter and the circuit, and the used resistor or capacitor can be repeatedly used, thus saving cost.