A button apparatus with dual elastic elements includes a base, a key top located above the base, an elevation mechanism, and a complex elastic unit. The elevation mechanism is used to execute lifting and lowering operation between the base and the key top. The complex elastic unit, positioned between the base and the key top for providing resilience to the button apparatus, further includes a lower elastic element mounted on the base and an upper elastic element mounted under the key top. When the button apparatus is operated, an S-shaped resilience pattern can be provided by the complex elastic unit to generate a two-step punch feeling back to the user. Thereby, controllability of the button apparatus can be enhanced.