The present invention provides a monitoring camera apparatus which can measure camera installation height easily with a simple configuration. The monitoring camera apparatus includes a distance detecting unit and direction detecting unit. The distance detecting unit detects subject distance D to a subject using an autofocus function. The direction detecting unit detects a shooting direction θ of the imaging unit rotated by a rotating mechanism. A height calculating unit calculates camera installation height H by converting the detected subject distance D into vertical length using the shooting direction θ in which the subject distance D is detected.