A drill for forming bores in constructional components and including a tubular stem (2; 22; 32; 42) having an axially extending through-channel (3; 23; 33; 43) which opens into at least one suction opening (7; 11; 27; 37; 47), a shank (5) provided at a rear end of the stem for connecting the drill to a drilling tool (M), and a drilling head (8; 28; 38; 48) having lips (9; 29; 39; 49) and formed entirely of a cutting material and substantially butt-joined to the stem (2; 22; 32; 42) at a free front end of the stem (2; 22; 32; 42), with at least one suction opening being formed by a mouth opening of a front channel (12; 26; 36; 46) which is limited, at least partially by a material of the drilling head (8; 28; 38; 48) and a mouth surface of which, at least partially is arranged in a circumferential region of at least one of the stem (2; 22; 32; 42) and the drilling head (8; 28; 38; 48).