商会（有时又写作贸易会，英文：Chamber of commerce）是商业业务合作的一种，例如数所公司想扩展业务，赚更多的金钱，就开设商会，以便数所公司一同合作，达到理想。一些商会在城市或市镇也代表整个业界，所有该行业的公司都加入该商会，并在会议上制定业界守则，及选出主席及相关职位的担任人，通常这些职位都是由商会的会员 (该行业的公司)推荐及委任。

第一个商会在1599年于欧洲成立。而世界上最古老的英文商会于1768年于纽约市成立，目前已知最早成立但依然存在的英文商会是Glasgow Chamber of Commerce，成立于1783年。

A chamber of commerce (or board of trade) is a form of business network, for example, a local organization of businesses whose goal is to further the interests of businesses. Business owners in towns and cities form these local societies to advocate on behalf of the business community. Local businesses are members, and they elect a board of directors or executive council to set policy for the chamber. The board or council then hires a President, CEO or Executive Director, plus staffing appropriate to size, to run the organization.