A display device includes a supporting member, and a display member detachably joined to the supporting member. The display member includes a first case 20, first connecting terminals 23, and a first joint surface 31. The supporting member includes a second case 36, second connecting terminals 38, and a second joint surface 40. The first case 20 has a terminal mounting hole 42 formed. The first connecting terminal 23 is inserted into the terminal mounting hole 42. The first case 20 has a first seal member 47 that seals a gap between the first connecting terminal 23 and the terminal mounting hole 42. The distal end of the first seal member 47 is exposed on the first joint surface 31, comes into contact with the second joint surface 40, and surrounds the distal ends of the first and second connecting terminals 23 and 38 to each other.