耳机放大器（英语：Headphone Amplifier) 简称耳放，是放大器的一种，是一种专门设计来驱动耳机的声频放大器。耳机放大器一般会在电子设备、音乐播放器及电视中以集成电路的形式出现，不过也有独立的耳机放大器。

A headphone amplifier is a low-powered audio amplifier designed particularly to drive headphones instead of loudspeakers. Most commonly they are found embedded in electronic devices that have a headphone jack, such as integrated amplifiers, portable music players (e.g., iPods), and televisions, but standalone units are used, especially in music studios and in audiophile markets. Headphone amplifiers are available in consumer grade models and professional audio models, which are used in recording studios.