Abstract: A holder is provided for microfiche or other types of flexible sheets. The holder comprises a generally rectangular body having first and second major walls supported in substantially parallel relation to define a cavity therebetween in the body. A slot is formed along one side of the body extending between the first and second major walls through which microfiche enters and exits the cavity. A labyrinth-type lock is provided for retaining microfiche in the cavity, consisting of a projecting lip adjacent the slot on the first major wall and a ridge positioned inwardly from the lip on the second major wall. An opening is formed in the first major wall opposite the ridge to permit microfiche in the cavity to be contacted through the opening and guided around the ridge and the projecting lip for removal.