Opening and closing device of glovebox for automobile and glovebox assembly having the same

Disclosed are an opening and closing device of a glovebox for an automobile and a glovebox assembly having the same, which is convenient to open and close the glove box, increases storage capacity of the glovebox, and improves freedom of design. The opening and closing device of the glovebox for the automobile may include: a knob unit provided in a glovebox housing of the automobile and used to open a glovebox door from the glovebox housing; and a locking unit provided in the glovebox door and locking and releasing the glovebox door with respect to the glovebox housing in connection with the knob unit. Here, the knob unit may include a push button installed at an edge of the glovebox housing and exposed to an outside; a knob rod extended from the push button toward an inside of the glovebox housing; and an operation rod connecting with the knob rod to slide via an inclined surface and transmitting operation force to the locking unit through the slide.