Abstract: A lockable fishing rod holder includes an elongate tubular member which may attached to the outside of a vehicle for supporting a fishing rod in a generally upright position, and a lockable sleeve rotatably engaged on the tubular member. The sleeve and tubular member have longitudinally extending slots therein which may be placed in registry with one another to permit the mounting bracket for the reel on the fishing rod to be moved through the slots lengthwise of the tubular member, and which may be placed out of registry with one another to prevent movement of the mounting bracket through the slots, thereby locking the fishing rod to the holder and preventing its unauthorized withdrawal from the holder. A lock may be engaged between the tubular member and sleeve to prevent relative rotational movement therebetween.