PURPOSE: To enable to elongate a plant support tool in response to the growth of a plant for the practical use thereof by projectingly disposing near or around the plant the plant support tool comprising a detachable connecting member and a connecting member having catching sections such as penetrated holes or grooves to support the plant.

CONSTITUTION: Plant support tools are projecting disposed near or around a plant, and the tools are readily bound with the plant with a string or with each other to support the plant, the plant support tools each comprising a longitudinally detachable connecting member 1 having mutually detachable connecting members 2a and 2b formed at both the upper and lower ends or upper end thereof and further having catching sections such as penetrated holes, grooves or notches formed therein.