A plurality of profile rolls which are revolving are radially inwardly pressed against the peripheral surface of an end portion of a pipe to be formed so that a suitable profile is plastically formed on the end portion of the pipe. Each of the profile rolls is rotatably carried by a shaft at the distal end of a swing assembly whose proximal end is pivotably mounted to a pivot shaft on a rotary assembly which is rotatable. A cam follower on the distal end shaft of each swing assembly is forced by a cam laterally so that the rotary assemblies are rotated, resulting in radially inward displacement of the profile roll. Thus, the apparatus is compact in size, easily operable at a working site and reliable in operation.