Abstract: The invention relates to an aircraft passenger seat comprising components such as a seat part, backrest and at least one console that laterally delimits the seat part and forms an armrest. Said console comprises a receptacle for a tray (9), which has an articulated connection to the console by means of a positioning mechanism (11) and which can be displaced from an unused position, in which it lies flush with the console, into either a partitioning position, in which it is raised from the console and vertically extends the lateral delimitation of the seat part, or from said position into a horizontal position, in which it forms a table top. As the support for the tray (9), the positioning mechanism (11) comprises an arm (17), which is pivotally connected to the console about a first axis (21) and a second axis (27) that forms a right-angle with said first axis. The first axis (21) is fixed in the console and runs horizontally and perpendicularly to the main plane of the console.