Portable endoscope system

A portable endoscope system having an illuminating light guide for transmitting light for illuminating an object, said illuminating light guide having an entrance end portion disposed in an endoscope control part, and an illuminating light supply unit for supplying illuminating light to said illuminating light guide, said portable endoscope system comprising:

• a connecting system that detachably connects said illuminating light supply unit and said control part;
• a mechanism that seals a joint between said illuminating light supply unit and said control part, made by said connecting system, in a watertight manner so that water will not enter into said portable endoscope system when said illuminating light supply unit is attached to said control part;
• and
• a mechanism that seals said control part in a watertight manner as a single unit;
• said illuminating light supply unit containing a light source lamp for emitting illuminating light to said illuminating light guide, a battery for supplying lighting energy to said light source lamp, a movable contact member positioned to contact an electrode of said battery, and separable from said battery in said illuminating light supply unit, and a spring biasing said battery in a direction opposite to a direction in which said movable contact member is moved for separation from said battery.