A damping valve (V) comprising: a valve seat member provided with a port ; a valve body that opens or closes the port ; a back-pressure chamber (P) configured to bias the valve body toward the valve seat member using an internal pressure; a pilot passage configured to reduce a pressure upstream of the port and guide the pressure into the back-pressure chamber (P); and a pilot valve (Pi) provided in the middle of the pilot passage , the pilot valve (Pi) being configured to control the internal pressure of the back-pressure chamber (P), wherein the pilot valve (Pi) has a pilot valve seat member and a pilot valve body , the pilot valve seat member having a cylindrical valve container provided with a penetrating hole connecting the inside and the outside, the penetrating hole communicating with the port , and an annular pilot valve seat provided in an end of the valve container , and the pilot valve body having a large diameter portion , a small diameter portion slidably inserted into the valve container , and a concave portion provided between the large diameter portion and the small diameter portion to face the penetrating hole , and an end of the large diameter portion is seated on or unseated from the pilot valve seat to open or close the pilot passage , the valve container has a bottomed cylindrical shape and forms a space (K) along with the pilot valve body , characterised in that the pilot valve body has a communicating channel communicating one end with the other end, the space (K) communicates with the outside via the communicating channel , and the pilot valve body has an orifice provided in the middle of the communicating channel . a valve seat member provided with a port ; a valve body that opens or closes the port ; a back-pressure chamber (P) configured to bias the valve body toward the valve seat member using an internal pressure; a pilot passage configured to reduce a pressure upstream of the port and guide the pressure into the back-pressure chamber (P); and a pilot valve (Pi) provided in the middle of the pilot passage , the pilot valve (Pi) being configured to control the internal pressure of the back-pressure chamber (P), wherein the pilot valve (Pi) has a pilot valve seat member and a pilot valve body , the pilot valve seat member having a cylindrical valve container provided with a penetrating hole connecting the inside and the outside, the penetrating hole communicating with the port , and an annular pilot valve seat provided in an end of the valve container , and the pilot valve body having a large diameter portion , a small diameter portion slidably inserted into the valve container , and a concave portion provided between the large diameter portion and the small diameter portion to face the penetrating hole , and an end of the large diameter portion is seated on or unseated from the pilot valve seat to open or close the pilot passage , the valve container has a bottomed cylindrical shape and forms a space (K) along with the pilot valve body , characterised in that the pilot valve body has a communicating channel communicating one end with the other end, the space (K) communicates with the outside via the communicating channel , and the pilot valve body has an orifice provided in the middle of the communicating channel . <EOS>