A lateral electric field type liquid crystal display device prevents the generation of the reverse rotation domain when the reverse-rotation domain preventing structure using the floating electrodes is adopted. A first liquid-crystal driving electrode (e.g., pixel electrode) and a second liquid-crystal driving electrode (e.g., common electrode) comprise comb-tooth-like parts extending approximately parallel to each other and being meshed with each other, respectively, in a region where images are displayed by applying a liquid-crystal driving electric field to liquid crystal. An electrically isolated first floating electrode is provided in the vicinity of the top end of the comb-tooth-like part of the first liquid-crystal driving electrode, where the first floating electrode comprises an overlapped part which is overlapped with the top end by way of an insulating film. The capacitance intervening between the first floating electrode and the first liquid-crystal driving electrode is greater than the capacitance intervening between the first floating electrode and the second liquid-crystal driving electrode.