The invention relates to an arrangement (10) in a forest machine (100), which forest machine (100) includes a chassis (12), a swing bogie (14) comprising a swing frame (16) and at least two wheels (18), a power transmission (19), and a swing bearing (20) attached to the chassis (12) for mounting the swing bogie (14) on the chassis (12), which arrangement (10) includes support means (11) for supporting the swing frame (16) at least sometimes on the chassis (12) of the machine. The support means (11) include a support surface (22) fitted in connection with the forest machines (100) chassis (12) at the side of the chassis (12) and a counter surface (24) fitted in connection with the swing frame (16) on the side of the swing frame (16) for transmitting lateral forces with the aid of the support surface (22) and the counter surface (24) between the chassis (12) and the swing frame (16) during contact between the support surface (22) and the counter surface (24), which support means (11) are located at a distance (1) from the swing bearing (20) in the space between the wheels (18) of the swing bogie (14) and the support means (11) include two pairs (26) formed by the support surface (22) and the counter surface (24), located on both sides of the said swing bearing (20). The invention also relates to a corresponding forest machine.Linvention porte sur un agencement (10) dans une machine forestière (100), laquelle machine forestière (100) comprend un châssis (12), un bogie oscillant (14) comprenant un cadre oscillant (16) et au moins deux roues (18), une transmission de puissance (19) et un palier oscillant (20) fixé au châssis (12) pour monter le bogie oscillant (14) sur le châssis (12), lequel agencement (10) comprend des moyens de support (11) pour supporter le cadre oscillant (16) au moins parfois sur le châssis (12) de la machine. Les moyens de support (11) comprennent une surface de support (22) montée en liaison avec le châssis (12) de la machine forestière (100) sur
