To provide a foaming sheet for a temporary line capable of solving such a problem that it takes a high cost because a tape is laid on the road surface to make vehicular traffic by applying a cold paint thereon while calling the term of stability as the temporary line for being required to make vehicular traffic immediately after the paving, however, it is required to install a traffic sign after the paving is stabilized for a week or so after the completion of the regular paving in the asphalt paving and, at the same time, that labor and waste disposal are required for eliminating a sheet after the pavement is stabilized for the sheet and the tape.

The foaming sheet 1 is regarded as the temporary line to make hard to cause a traffic trouble by finishing (attractiveness) of construction, simplification of construction and immediacy of traffic release. Also in installation work of the traffic sign by the paving carried out after the paving has been stabilized, the work can be quickly carried out at a low cost and, at the same time, the waste disposal is not required.