NOVELTY - The wooden log comprises a transverse upper face (1), a transverse lower face, a lateral face (3), a recess extending from the upper transverse face in the direction of the transverse lower face, a unit having chimney effect, and a handle for ensuring grip and transport. The recess contains an initiator (5) for the combustion of log, where the initiator has a height less than or equal to the height of the recess. The unit having chimney effect comprises grooves (6, 8, 9) from which the transverse upper face extend towards the transverse upper face under a surface of the initiator.    USE - The wooden log is useful for producing heat and light.    ADVANTAGE - The wooden log is capable of efficiently producing the heat by uniform combustion without producing large amount of smoke and projecting incandescent materials thus protecting the environment.    DETAILED DESCRIPTION - The wooden log comprises a transverse upper face (1), a transverse lower face, a lateral face (3), a recess extending from the upper transverse face in the direction of the transverse lower face, a unit having chimney effect, and a handle for ensuring its grip and transport. The recess contains an initiator (5) for the combustion of log, where the initiator has a height less than or equal to the height of the recess. The unit having chimney effect comprises: grooves (6, 8, 9) from which the transverse upper face extend towards the transverse upper face under a surface of the initiator; and openings located below the level of initiator. The initiator is completely or partially surrounded by a protective cover, which is constituted of a non-fire retardant and non-solid material and is suitable to prevent the material flow at an exterior of the log. The non-solid material is obtained from the combustion. The initiator is: in the form of a mass of solid, semi solid or liquid material; constituted of paraffin; and equipped with a firing wick. Distal ends (10) of grooves are located at maximum equivalent distance at the height of the recess. A maximum width formed by the initiator and the protective cover is less than a minimum width of the recess. An end of the firing wick is located below the transverse upper face of the log, where a width of the wick is 10-20% of a width of the initiator mass. The upper face has a concave configuration. The protective cover is made from a sheet of (non) rigid material and optionally made of waxed paper sheet or waxed cardboard sheet. The wood is obtained from hardwood or softwood.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic front view of a wooden log.    Transverse upper face (1)    Lateral face (3)    Initiator (5)    Grooves (6, 8, 9)    Distal end. (10)