An optical detection device includes: a first emitting unit that emits first emitting light in a radial pattern and having an intensity that differs in accordance with an emitting direction; a second emitting unit that emits second emitting light in a radial pattern and having an intensity that differs in accordance with an emitting direction; a light receiving unit that receives first reflection light acquired by reflecting the first emitting light emitted from the first emitting unit off an object and second reflection light acquired by reflecting the second emitting light emitted from the second emitting unit off the object; and a detection unit that detects a position of the object based on a result of the light reception in the light receiving unit.