an image pickup device such as a ccd sensor or a cmos sensor not shown in the figure and photoelectrically converted into an image signal the image signal is output from the image pickup device and recorded to a recording medium not shown in the figure reference numeral 14 denotes a flash unit which is built on the second front exterior member 12 the flash unit irradiating flashlight to the object at the time of image taking reference numeral 15 denotes an optical viewfinder provided in the left of the flash unit 14 the optical viewfinder being used for observing the object by the photographer reference numeral 16 denotes a release button an image taking preparation operation such as a photometry operation and a focus detection operation is started according to a first stroke operation of the release button 16 an image taking operation such as an exposure operation of the image pickup device and a recording operation in which the output from the image pickup device is recorded to the recording medium is started according to a second stroke operation of the release button 16 next the detailed description will be given of the strap opening 11 c with reference to fig2 and 3 the strap opening 11 c is formed in the left portion of the first front exterior member 11 when viewed from the front and has an l shaped cross section when viewed from the top as shown in fig3 the second front exterior member 12 is attached to the back surface.