1. An image capturing apparatus comprising: an image capturing section; a moving image capturing control section for causing the image capturing section to capture a moving image including a plurality of frame images; a still image capturing instruction reception section for receiving an instruction to capture a still image when the image capturing section continuously captures the plurality of frame images; a still image capturing control section for causing the image capturing section to capture the still image at a timing after the capturing instruction reception section receives the instruction to capture the still image and before the image capturing section captures a frame image following the last frame image captured when the still image capturing instruction reception section receives the instruction to capture the still image; a still image capturing timing recording section for recording a still image capturing timing at which the image capturing section captures the still image; a frame image before/after image capturing extracting section for extracting the frame image captured before and the frame image captured after the still image capturing timing recorded by the still image capturing timing recording section from the plurality of frame images captured by the image capturing section; and a frame image generating section for creating a frame image at the timing at which the image capturing section captures the still image based on the frame image captured before and the frame image captured after the still image capturing timing extracted by the frame image before/after image-capturing extracting section, wherein the frame image generating section includes: an exposure time recording section for recording a still image exposure time at which the image capturing section captures the still image; a composite ratio calculating section for calculating a composite ratio between the still image captured by the image capturing section and at least one of the frame image captured before and the frame image captured after the still image capturing timing extracted by the frame image before/after image-capturing extracting section based on the still image exposure time recorded by the exposure time recording section; and a frame image combining section for combining the still image captured by the image capturing section with at least one of the frame image captured before and the frame image captured after the still image capturing timing extracted by the frame image before/after image-capturing extracting section at the composite ratio calculated by the composite ratio calculating section to create a frame image at the timing at which the image capturing section captures the still image.