Abstract: A hanger for suspending a boat fender alongside the hull of a boat to prevent damage from collision with another boat, a dock or other object near which the protected boat is to be tied or berthed. The boat fender hanger is hung from a suspension cable on the protected boat, such as a guard rail or lifeline, and a suspension line attached to the fender is secured to the hanger. The hanger can be transported easily from one position to another on the cable and it has an anti-detachment feature which reduces the risk of accidentally losing the hanger and fender overboard. The hanger provides the ability to move the hanger from place to place on the suspension cable and to adjust the vertical elevation of the fender using only one hand. The novel hanger has an elongated body separated from a back plate by a channel which receives the suspension cable for hanging the hanger.