A paper holder comprising: a case including a front portion, a back portion disposed with a space from the front portion and facing to the front portion substantially in parallel, an upper portion for connecting the front portion and the back portion, and an insertion opening for inserting paper into between the front portion and the back portion from below; and a holding piece axially rotatably supported by an axial support portion provided inside the case and biased by a spring force in a direction of pulling out the paper, and including a blade configured to project from an end of the holding piece toward the front portion, a pointed end of the blade being configured to be brought into contact with the paper inserted from the insertion opening to hold the paper, wherein the back portion includes an inclined portion extending substantially linearly from a lower end portion of the back portion in the paper insertion direction, when viewed from the side, the axial support portion is provided on an inner side of the inclined portion, and characterised in that the back portion is an extended back portion extending further downward than a lower end portion of the front portion and in that the front portion has transparency, and on the inner surface of the front portion, there are provided a forward inclined portion and a backward inclined portion arranged such that in use the paper bulges toward the front side of the paper holder. a case including a front portion, a back portion disposed with a space from the front portion and facing to the front portion substantially in parallel, an upper portion for connecting the front portion and the back portion, and an insertion opening for inserting paper into between the front portion and the back portion from below; and a front portion, a back portion disposed with a space from the front portion and facing to the front portion substantially in parallel, an upper portion for connecting the front portion and the back portion, and an insertion opening for inserting paper into between the front portion and the back portion from below; and a holding piece axially rotatably supported by an axial support portion provided inside the case and biased by a spring force in a direction of pulling out the paper, and including a blade configured to project from an end of the holding piece toward the front portion, a pointed end of the blade being configured to be brought into contact with the paper inserted from the insertion opening to hold the paper, wherein the back portion includes an inclined portion extending substantially linearly from a lower end portion of the back portion in the paper insertion direction, when viewed from the side, the back portion includes an inclined portion extending substantially linearly from a lower end portion of the back portion in the paper insertion direction, when viewed from the side, the axial support portion is provided on an inner side of the inclined portion, and characterised in that the back portion is an extended back portion extending further downward than a lower end portion of the front portion and in that the front portion has transparency, and on the inner surface of the front portion, there are provided a forward inclined portion and a backward inclined portion arranged such that in use the paper bulges toward the front side of the paper holder.