This EEG dataset of emotional brain waves contains records of four emotional states (happiness, sadness, fear, and anger) recorded from 21 participants. The dataset comprises Theta, Gamma, Alpha, Beta, and Delta wavelets. The study was published with the title "A Socioenactive Perspective on Emotion Contagion and Senses: Analyzing the Phenomenon via EEG Signals" and contributes to the Socioenactive Systems FAPESP Thematic Project (#2015/16528-0), with Ethical Committee number CAAE 72413817.3.0000.5404.