The liquid consuming apparatus includes a detection portion 90 having a light-emitting portion 92 and a light-receiving portion 94, a holder 20 in which a liquid container provided with a prism 170 is attachably and detachably installed, the holder 20 having an opening portion 22 provided at a position facing the prism 170 when the liquid container is installed, and a reflection portion 24, and a moving portion that relatively moves the holder in a first direction with respect to the detection portion 90. A first portion of the holder 20 that is peripheral to the reflection portion 24 in a plan view of the holder 20 as seen from the side of the detection portion 90 has an inclined face that inclines in a second direction intersecting the first direction.