We present here MarmAudio, a database of common marmoset vocalizations, which were continuously recorded with a sampling rate of 96 kHz from a stabulation room housing simultaneously ~20 marmosets in three cages. The dataset comprises more than 800,000 files, amounting to 253 hours of data collected over 40 months. Each recording lasts a few seconds and captures the marmosets' social vocalizations, encompassing their entire known vocal repertoire during the experimental period. Around 215,000 calls are annotated with the vocalization type. We validated our dataset by sampling 700 representative recordings and cross-examining them with four experts.