Protective case having card storages for portable electronic device

A protective case (10) configured to cover a portable electronic device (40), the protective case (10) comprising:

• a first card storage (100) configured to store a first card (20);
• and
• a second card storage (200) configured to store a second card (30) wherein the second card storage (200) is spaced apart from the first card storage (100),
• wherein the first card storage (100) comprises a first storage slide groove (120) and a first spacer protrusion (140) wherein the first storage slide groove (120) is configured for the first card (20) to slide along and couple to the first storage slide groove (120), and the first spacer protrusion (140) forms a card separating space (150) between the first and second cards (20, 30),
• wherein the second card storage (200) comprises a second storage slide groove (220) and a second spacer protrusion (240) wherein the second storage slide groove (220) is provided near the first storage slide groove (120) and configured for the second card (30) to slide along and couple to the second storage slide groove (220), and the second spacer protrusion (440), provided near or adjacent to the second storage slide groove (220), forms a space (250) between the second card (30) and the portable electronic device (40),
• wherein the first card storage (100) is formed higher than the second card storage (200) by a predetermined height, and a lower end of the second card (30), which is retained at a more inner side than the first card (20), is at least partially exposed when the first and second cards (20, 30) are retained in the first and second card storages (100, 200).