Abstract: A traveler's extendable bath seat is made up of two parts, the first of which is a carrying case in which the second is stored and transported. When so stored the bath seat is small enough to be carried in a briefcase or luggage. The two parts are slide coupled so that the overall length of the combination can be extended to span a bathtub. Safety locking devices are included to maintain the extendible bath seat at a fixed length and to restrain it in position atop the tub.