Height adjustable tarpaulin structure

The structure has side walls (3) with a side tarpaulin (6) and a length adjustable post (7) that is connected with the side tarpaulin. The post comprises a post body (15) and a post sliding unit (16) that is upwardly pushed opposite to the post body for extension of the post. A beam (10) is lengthwise extended to the structure in a connection region between a roof (2) and the side walls. The post body is held at the beam over the sliding unit. The post comprises a tarpaulin holder (18) for fixation of the side tarpaulin above the post body in a position.