A classification of oil and gas reservoir beds of volcanic rocks is put forward on the basis of existing data and the latest materials in the Shengli and Liaohe Oil Fields. Reservoirs of volcanic rocks are mainly classified into three types-, lava reservoir, pyroclastic reservoir and sub-volcanic reservoir. The pyroclastic reservoirs can be further divided into two sub-types: the normal pyroclastic reservoir and the sedimentary pyroclastic reservoir; and the sub-volcanic reservoirs can be further divided into two sub-types: the breccia reservoir and the altered invasive reservoir. Some examples are discussed to illustrate the different reservoirs, and the characteristics of these reservoirs are summarized.