The invention relates to the technical field of articles of daily use, in particular to a nightly luminous cup. The nightly luminous cup can improve the heat preservation effect; the water cannot flowout when the cup is upset by accident, so that the reliability is improved; a taking placing port can be clearly distinguished when the light is weaker, so that the practicability is improved; the cup comprises a cup body, and the top end of the cup body is provided with the taking placing port; the cup further comprises an outer cup cover and an inner cup cover, and the inner cup cover is sleeved with an annular sealing ring; the cup further comprises a left spring, a left connecting rod, a right spring and a right connecting rod, and the front side and back side of the bottom end of the outer cup cover are both provided with L-shaped clamping blocks matched with L-shaped clamping grooves; the cup further comprises a cup seat, the upper end of the left side wall and upper end of the right side wall of the cup body are respectively provided with a first placing groove and a second placing groove, the first placing groove is internally provided with a first LED lamp, the bottom end ofthe cup body is provided with a third placing groove, and the third placing groove is internally provided with a storage battery and a switch.