An operator compartment (101) of a railway vehicle (100) is equipped with: lateral structures (15) and a roof structure (16); and an internal panel unit (20) having a pair of lateral panels (30) positioned on the inside of the lateral structures (15), a ceiling panel (40) positioned on the inside of the roof structure (16), and a rear-surface panel (50) for dividing the operator compartment (101) from a passenger compartment. One or more of the plurality of panels has an opening (31) formed therein into which an adjustment member (21) for adjusting the positions of the panel and the lateral structures (15) or the roof structure (16) is insertable. Adjacent panels are connected with one another, demarcating the interior space of the operator compartment (101), and the adjustment member (21) adjusts the position of the demarcated operator compartment (101) in relation to the lateral structures (15) and the roof structure (16).