At the 1987 General Election , the Conservatives were reduced from 21 to 10 Scottish seats , and the party lost all of its Scottish seats in 1997 . The last time that the Conservatives won the most seats in Scotland , was in the general election of 1955 . From the early 1960s that role was taken by the Labor Party and the Scottish Conservatives went into a state of decline , which culminated in the loss of all Scottish Conservative seats in 1997 .