Wooden building block for realizing walls, comprising: - two plate-shaped exterior-wall elements with an essentially rectangular cross-section (Q 10 ), and - at least one plate-shaped interior-wall element arranged between the two exterior-wall elements with an essentially rectangular cross-section (Q 11 ), wherein the at least one interior-wall element is designed and arranged relative to the two exterior-wall elements in such a way that a) a first longitudinal side and a first transverse side of the interior-wall element project with relation to the two exterior-wall elements and each form one or a plurality of tongues , wherein at least one second longitudinal side or a second transverse side of the interior-wall element is recessed with relation to the two exterior-wall elements and forms one or a plurality of grooves , or b) one first longitudinal side and one first transverse side of the interior-wall element are each recessed with relation to the two exterior-wall elements and each form one or a plurality of grooves , wherein at least one second longitudinal side or a second transverse side of the interior-wall element projects with relation to the two exterior-wall elements and each forms one or a plurality of tongues , characterized in that at least one interior-wall element and/or the exterior-wall elements are segmented in segments , wherein the wooden building block extends in a longitudinal direction (L), and the segments are arranged in the longitudinal direction (L) adjacent to one another. - two plate-shaped exterior-wall elements with an essentially rectangular cross-section (Q 10 ), and - at least one plate-shaped interior-wall element arranged between the two exterior-wall elements with an essentially rectangular cross-section (Q 11 ), wherein the at least one interior-wall element is designed and arranged relative to the two exterior-wall elements in such a way that a) a first longitudinal side and a first transverse side of the interior-wall element project with relation to the two exterior-wall elements and each form one or a plurality of tongues , wherein at least one second longitudinal side or a second transverse side of the interior-wall element is recessed with relation to the two exterior-wall elements and forms one or a plurality of grooves , or b) one first longitudinal side and one first transverse side of the interior-wall element are each recessed with relation to the two exterior-wall elements and each form one or a plurality of grooves , wherein at least one second longitudinal side or a second transverse side of the interior-wall element projects with relation to the two exterior-wall elements and each forms one or a plurality of tongues , a) a first longitudinal side and a first transverse side of the interior-wall element project with relation to the two exterior-wall elements and each form one or a plurality of tongues , wherein at least one second longitudinal side or a second transverse side of the interior-wall element is recessed with relation to the two exterior-wall elements and forms one or a plurality of grooves , or b) one first longitudinal side and one first transverse side of the interior-wall element are each recessed with relation to the two exterior-wall elements and each form one or a plurality of grooves , wherein at least one second longitudinal side or a second transverse side of the interior-wall element projects with relation to the two exterior-wall elements and each forms one or a plurality of tongues , characterized in that at least one interior-wall element and/or the exterior-wall elements are segmented in segments , wherein the wooden building block extends in a longitudinal direction (L), and the segments are arranged in the longitudinal direction (L) adjacent to one another. <EOS>