<p>Provided is a recyclable formwork capable of properly detecting, without impairing the function of the recyclable formwork, the temperature of concrete installed between formworks actually on site. The recyclable formwork comprises: a recyclable formwork main body (1) having a plurality of ribs (3, 4); a housing (7) housed between the ribs (3, 4) and fixed to the side of a non-contact surface (1a); and a circuit housed in the housing (7). A through-hole (16) passing through from the non-contact surface (1a) to a contact surface (2) is opened in the recyclable formwork main body (1) in correspondence to the position at which the housing (7) is fixed. A sensor housing case (17) passing through the through-hole (16) and having a bottom surface (17a) facing concrete (18) is provided at a lower part of the housing (7). A concrete temperature detection sensor (19) for detecting the surface temperature of the concrete (18) is housed in the sensor housing case (17).</p>
