This invention provide an adhesive tape by which adhesion to a metal spreader is not required and a cutting process is not necessary. The adhesive tape comprises an adhesive layer provided on at least one surface of metal sheet, said adhesive layer being semi-cured into a B-stage and comprised of: (a) a piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer of the formula (I): ##STR1## wherein, k, m, and n are molar ratios and taking n as l, k is a number of 3-175, and m is a number of 0.3 to 93; and (b) a compound having at least two maleimide groups, the ratio of component (b) based on 100 parts by weight of component (a) being in a range of 10 to 900 parts by weight, and said adhesive layer being composed of at least two semi-cured layers having each a different status of semi-cure.