An earplug apparatus and an electronic apparatus are provided. The earplug apparatus includes: a biological feature detection module, the biological feature detection module being arranged in the earplug apparatus and being configured to be fit in a region enclosed by an outer ear canal and an ear canal entrance； wherein the biological feature detection module comprises a light emitting unit and a light receiving unit, wherein the light emitting unit is configured to emit light to the enclosed region, the light emitted by the light emitting unit is processed by an ear tissue in the enclosed region and transmitted to the light receiving unit, and the light receiving unit is configured to convert the received light photoelectrically to generate an original electrical signal for biological feature detection. In this way, the entire size of the final product is small, and wearing comfort is enhanced.
