Driver's cab and railcar including driver's cab

A railcar driver's cab comprising:

• side bodyshells;
• a roof bodyshell;
• an interior panel unit including:
• a pair of side panels located at an inner side of the side bodyshells;
• a ceiling panel located at an inner side of the roof bodyshell;
• and
• a back-surface panel that separates the driver's cab from a passenger room;
• an opening portion in one of the panels through which an adjusting member is inserted, the adjusting member being configured to adjust a relative position of the one panel and one of the side bodyshells or a relative position of the one panel and the roof bodyshell;
• coupling portions that couple adjacent panels to each other and are not used to couple the adjacent panels to the side bodyshells or the roof bodyshell;
• and
• an interior space of the driver's cab defined by the side panels, the ceiling panel, and the back-surface panel, which are coupled to one another by the coupling portions to form the interior panel unit prior to coupling the panels to the bodyshells,
• wherein the adjusting member adjusts a position of the driver's cab relative to the side bodyshells or the roof bodyshell.