<p><P>PROBLEM TO BE SOLVED: To provide a plant year-round culture growing device having good heat exchange efficiency to obtain sufficient heat regulation effect, and easily and rapidly correspondable with increase and decrease in a culture range. <P>SOLUTION: This plant year-round culture growing device includes a growing container 1 for planting plant seedlings, with a long and slender shape viewed from above. A passage space part 11 for pouring a heat regulation medium to the longitudinal direction L of the growing container 1 is formed on a longitudinal wall part 10, an inflow port 12 for a heat regulation medium is installed on the one longitudinal end of the longitudinal wall part 10, and a discharge port 13 for a heat regulation medium is installed on the other longitudinal end. <P>COPYRIGHT: (C)2011,JPO&INPIT</p>