The present invention relates to a petroleum stove, more specifically to a recombustion device which prevents imperfect combustion after ignition and before normal combustion and burns combustion gas effectively, thereby enabling favorable heating. The present invention comprises: a stove body (20) in which a fixed core (23) is inserted in a core pipe (22), an oil supply controller (35) which is installed on the other side of a support (10) and connected to the core pipe (22) through a fuel supply pipe (36) supplying fuel from a fuel tank (37), and a recombustion unit (40) which is installed on top of a support cover (29) and includes a heat radiation unit (41) in which a recombustion chamber (42) is installed. The recombustion chamber comprises: an inner recombustion chamber (43a) which is formed in a cup shape, and an outer recombustion chamber (43b) which is formed in the shape of a cylinder with a wide top and narrow bottom with a bottom diameter less than the diameter of an outercombustion chamber (25b). The top of the outer recombustion chamber is closed with a cover (44) while the bottom is secured on the upper side of the support cover (29). The inner recombustion chamberis inserted in the outer recombustion chamber (43b) and the upper part thereof is fixed to the cover (44). Through holes (45a, 45b) with a diameter of 6-8mm are formed on the inner and outer recombustion chambers (43a)(43b) at intervals of 0.5-1.5mm.