A wireless network interface device with concealable electrical interface includes a casing unit, a wireless receiver unit, an elastic assembly and an actuator. The casing unit has an outer body, an interface opening, and an actuator opening. The wireless receiver unit has a receiving module and an I-shaped groove. The I-shaped groove has a first recess and a second recess bridged by a connecting recess. The elastic assembly has at least one first elastic member. The actuator has a second elastic member, a releaser member, and a locking member. When the locking member is engaged to the first recess, at least one first elastic member is compressed with the electrical interface being concealed inside the casing unit. When the releaser member is pressed, the locking member disengages from the first recess, and at least one first elastic member pushes the receiving module to expose the electrically connected electrical interface.