A flashing night light includes: a night light base, a casing mounted to the night light base, a control circuit mounted to the casing and including a control substrate and light-emitting elements, and a light-transmitting unit including first and second light-transmitting plates. The light-emitting elements are controlled by the control substrate to lighten in sequence. Each of the first and second light-transmitting plates has a surface on which a predetermined pattern is formed. The patterns are arranged according to a sequence for desired displaying. The first and second light-transmitting plates include light receiving sections that are arranged to alternate in position and respectively correspond to the light-emitting elements and are fixed to the control substrate. With the light-emitting elements being arranged to lighten in sequence, lights emitting from the light-emitting elements may provide the patterns with an effect of image displaying and achieve a dynamic visual effect.