It doesn't look like a load-bearing one. Probably the transverse wall is load-bearing.
How thick is it?
How thick is it?
I would say that none of the interior walls are load-bearing, you have a span of about 4.8 m that does not have a wall under the middle of the trusses.
Our house, which is about 8*14 meters, has no load-bearing walls up to the trusses. In the basement, we have a longitudinal wall that can support the floor structure (between the basement & the ground floor) if there is too much load on the floor on the ground floor, but normally there is about a 0.5 cm air gap between the wall and the tongue-and-groove ceiling of the basement. The basement ceiling was put in place before the longitudinal basement wall was built.
Our house, which is about 8*14 meters, has no load-bearing walls up to the trusses. In the basement, we have a longitudinal wall that can support the floor structure (between the basement & the ground floor) if there is too much load on the floor on the ground floor, but normally there is about a 0.5 cm air gap between the wall and the tongue-and-groove ceiling of the basement. The basement ceiling was put in place before the longitudinal basement wall was built.