A symbol display device is provided with a first reel unit, a second reel
unit, and a third reel unit. Each of the first, the second, and the third
reel unit is composed as a double reel structure with an inner reel and
an outer reel. The inner reel and the outer reel are formed out of
light-transmittable material and have translucent symbols arranged on
their peripheries. A first light-emitting device is provided inside the
inner reel to illuminate the symbols on the inner reel from behind of
them and a second light-emitting device is provided between the inner
reel and the outer reel to illuminate the symbols on the outer reel from
behind of them. In order to illuminate the symbols on the outer reel,
only the second light-emitting device is lit up, while the first
light-emitting device is lit up in order to illuminate only the symbols
on the inner reel.