To provide an omnidirectional imaging apparatus easily discriminating a direction in which an imaged object exists.

Optical members 21, 24 make light L from respective directions incident on an imaging element 23. An image processing means 25 processes imaging data outputted from an imaging element 23 and generates a display image D2. A display means 26 displays a display image D2. Index parts 30R, 30B, 30G, 30Y become indexes of respective directions in the imaging data. The image processing means 25 outputs a display image obtained by processing the imaging data including the index parts 30R, 30B, 30G, 30Y to the display means 26. The index parts 30R, 30B, 30G, 30Y are colored parts colored at an equal angle interval.