The present invention is a compact and hands-free human breast milk collection device that fits into a mother's existing nursing or standard brassiere, or in another preferred embodiment, comprises a complete nursing brassiere and milk collection system. The invention can be attached to a regular electric pump or manual pump for active milk collection and also can be used without a pump for passive milk collection. The invention comprises a breast adaptor which is preferably a funnel-shaped inlet coupled to a reservoir, wherein when the breast is inserted into the breast adaptor, the expressed breast milk is expressed into the reservoir and is stored there until the device is removed and emptied.