A platform ladder apparatus having a transport position and a use position in which the apparatus is arranged to lean against a wall for performing work at an elevated level, said apparatus comprising: a ladder having a front side for climbing and a rear side facing the wall in the use position; a working platform having, seen from the front side of the ladder, a right side, a left side, a proximal side and an opposite distal side, the proximal side being located, in the use position of the apparatus, closer to the ladder than the distal side is, the proximal side of the platform being pivotally connected to the ladder at a platform pivot axis located at an upper end of the ladder, the platform being arranged, in the use position of the apparatus, to extend essentially horizontally out from the ladder with its distal side directed towards the wall, and the platform being arranged, in the transport position of the apparatus, to be pivoted about the platform pivot axis towards the ladder to a stowed position essentially parallel to the ladder; and a foldable user safety railing which in the use position of the apparatus is unfolded and arranged above the working platform for forming a protection for a user standing upon the platform, said safety railing comprising right and left proximal posts arranged at the proximal side of the platform, right and left distal posts arranged further towards the distal side of the platform, and guard rails (46, 47, 49) extending between the posts (42, 44), said safety railing being structured and arranged to be folded into a stowed position in the transport position of the apparatus, characterized in that, in the use position of the apparatus, each one of the proximal posts has an upper part which is located above the platform and a lower part which is located under the platform and which is pivotally connected below the platform for pivotal movement about the platform pivot axis, and wherein the user safety railing comprises a load transferring rail member extending between the upper parts of the proximal posts. a ladder having a front side for climbing and a rear side facing the wall in the use position; a working platform having, seen from the front side of the ladder, a right side, a left side, a proximal side and an opposite distal side, the proximal side being located, in the use position of the apparatus, closer to the ladder than the distal side is, the proximal side of the platform being pivotally connected to the ladder at a platform pivot axis located at an upper end of the ladder, the platform being arranged, in the use position of the apparatus, to extend essentially horizontally out from the ladder with its distal side directed towards the wall, and the platform being arranged, in the transport position of the apparatus, to be pivoted about the platform pivot axis towards the ladder to a stowed position essentially parallel to the ladder; and a foldable user safety railing which in the use position of the apparatus is unfolded and arranged above the working platform for forming a protection for a user standing upon the platform, said safety railing comprising right and left proximal posts arranged at the proximal side of the platform, right and left distal posts arranged further towards the distal side of the platform, and guard rails (46, 47, 49) extending between the posts (42, 44), said safety railing being structured and arranged to be folded into a stowed position in the transport position of the apparatus, characterized in that, in the use position of the apparatus, each one of the proximal posts has an upper part which is located above the platform and a lower part which is located under the platform and which is pivotally connected below the platform for pivotal movement about the platform pivot axis, and wherein the user safety railing comprises a load transferring rail member extending between the upper parts of the proximal posts.