1. An electronic camera having a continuous shooting function, comprising: an image capturing unit that captures a subject image; a setting unit that sets operating parameters related to image processing performed during image capturing; a resolution conversion unit that performs resolution conversion on image data of an image captured by said image capturing unit in correspondence to a resolution set by said setting unit; an image compression unit that performs image compression on image data converted by said resolution conversion unit in correspondence to a compression factor set by said setting unit; and a continuous shooting unit that performs continuous shooting by continuously driving said image capturing unit, said resolution conversion unit and said image compression unit to obtain a plurality of subject images, wherein: said resolution conversion unit is capable of performing resolution conversion at least at a high resolution and at a low resolution that is lower than the high resolution; said image compression unit is capable of performing image compression at least at a low compression factor and at a high compression factor that is higher than the low compression factor; said setting unit is capable of setting the resolution at said resolution conversion unit to the high resolution or the low resolution; and when said continuous shooting unit executes continuous shooting, said image compression unit performs image compression at the high compression factor in case that the resolution at said resolution conversion unit is set to the low resolution by said setting unit.