A planting unit which allows combing a plurality thereof to realize a low-cost planter of a desired configuration and a planter comprised of such planting units are provided. The planting unit 10 to constitute the planter comprises a housing 11 having a mounting space for placing a planting bed material 30 therein, a water reservoir portion capable of reserving planting water for the planting bed material 30 mounted in the mounting space, and a front face opening portion 13 allowing exposure therethrough of the planting bed material 30 mounted in the mounting space. At an upper portion of the housing 11, a water feeding portion 14 capable of feeding water to the water reservoir portion can be formed. At a lower portion of the housing 11, a water discharging portion 15 capable of discharging the water in the water reservoir portion can be formed. On each of left and right side portions of the housing 11, there can be formed a communication portion 17 allowing communication between the water reservoir portion of this planting unit 10 and a water reservoir portion of another planting unit 10 disposed on left or right adjacent side of the planting unit 10 as viewed in a front view.
