In recent years, many states have legalized the use and sale of marijuana for medical or even recreational purposes. This has led to the booming growth of a “legal” marijuana industry. Businesses openly growing and selling marijuana products to the consuming public face some unusual legal hurdles. Significantly, although the sale of marijuana may be legal at the state level, it is still illegal under federal law. This Article explores the conflict between state and federal marijuana laws from a business entity law perspective. For example, managers owe a fiduciary duty of good faith to their businesses and equity holders. One of the ways in which managers can violate this duty is by causing their business to intentionally violate the law. This is a problem for the marijuana industry because its managers constantly and intentionally violate federal law and therefore violate their fiduciary duties by growing and selling marijuana. This Article concludes that the industry’s ability to attract professional stakeholders is harmed by marijuana business stakeholders’ inability to take advantage of key business law protections, such as limited liability. This Article proposes a state law exception that allows marijuana businesses to operate normally under state business entity law, with normal business entity law protections, despite their continuing violation of federal law.