An in-vivo information acquiring system comprising: a body-insertable apparatus comprising: a capsule casing; a plurality of illuminating units (11a, 11b), provided in the capsule casing, that illuminate an interior of a body cavity; a plurality of imaging devices (12a, 12b), provided in the capsule casing while arrangement directions of the plurality of imaging devices (12a, 12b) are associated with one another, that constitute imaging blocks, respectively together with the paired illuminating units (11a, 11b), and that pick up images of the interior of the body cavity at backward and forward in a movement direction of the capsule casing; and an image acquiring unit that acquires the images of the interior of the body cavity, the images being picked up at time series by respective imaging devices (12a, 12b) of the body-insertable apparatus, characterized in that the image acquiring unit is configured to record the images together with image-processing instruction information based on an arrangement relationship between the plurality of imaging devices (12a, 12b) outside the body cavity, wherein the arrangement relationship corresponds to an angle between upward and downward directions of the plurality of imaging devices (12a, 12b). a body-insertable apparatus comprising: a capsule casing; a plurality of illuminating units (11a, 11b), provided in the capsule casing, that illuminate an interior of a body cavity; a plurality of imaging devices (12a, 12b), provided in the capsule casing while arrangement directions of the plurality of imaging devices (12a, 12b) are associated with one another, that constitute imaging blocks, respectively together with the paired illuminating units (11a, 11b), and that pick up images of the interior of the body cavity at backward and forward in a movement direction of the capsule casing; and an image acquiring unit that acquires the images of the interior of the body cavity, the images being picked up at time series by respective imaging devices (12a, 12b) of the body-insertable apparatus, a capsule casing; a plurality of illuminating units (11a, 11b), provided in the capsule casing, that illuminate an interior of a body cavity; a plurality of imaging devices (12a, 12b), provided in the capsule casing while arrangement directions of the plurality of imaging devices (12a, 12b) are associated with one another, that constitute imaging blocks, respectively together with the paired illuminating units (11a, 11b), and that pick up images of the interior of the body cavity at backward and forward in a movement direction of the capsule casing; and an image acquiring unit that acquires the images of the interior of the body cavity, the images being picked up at time series by respective imaging devices (12a, 12b) of the body-insertable apparatus, characterized in that the image acquiring unit is configured to record the images together with image-processing instruction information based on an arrangement relationship between the plurality of imaging devices (12a, 12b) outside the body cavity, wherein the arrangement relationship corresponds to an angle between upward and downward directions of the plurality of imaging devices (12a, 12b).