The invention relates to a forest machine (10), which includes - a chassis(12) of at least two parts, comprising a firstchassis (14) and a second chassis (16) pivoted consecutively by a centralpivot (36), - sets of wheels (18) arranged in connectionwith both the first chassis (14) and the second chassis (16), - an engine (22)for creating drive power, - power transmission (24) fortransmitting power, comprising a power transmission (24.1) of the firstchassis (14) and a power transmission (24.2) of the secondchassis (16), and - a load space (26) for transporting a load, supported onthe second chassis (16), in which the said second chassis(16) includes two longitudinal parts (48) attached to each other at least infront of the load space (26), and the load space (26) extendsbetween the longitudinal parts (48) in the vertical direction of the forestmachine (10). The power transmission (24.2) of the secondchassis (16) is arranged in the second chassis (16) in front of the load space(26) in the direction of travel of the forest machine (10),between the central pivot (36) and the load space (26), in order to distributepower to the drive wheel (25) of each set of wheels (18)of the second chassis (16) from in front of the load space (26), and each saiddrive wheel (25) in the second chassis (16) is installed inthe second chassis (16) a fixed position relative to the longitudinal lengthof the second chassis ( 16 ).
