Machine for the manufacture of boilies for sport fishing comprising: - a base frame (2, 3); - a forming roller (4) which has a central axis (A) horizontal and which is associated with the base frame (2, 3) in a rotatable way around the central axis (A), the forming roller (4) comprising a plurality of first annular reliefs (5) spaced out by a plurality of first annular grooves (6) - a forming body (7) which is statically associated with the base frame (2, 3) and which comprises at least a partially cylindrical active portion (8) tangent to the forming roller (4) in correspondence to a circular sector (9) of the forming roller (4), the forming body (7) comprising a plurality of second reliefs (10) which are substantially matching with the first reliefs (5) and are spaced out by a plurality of second grooves (11) cooperating with the first grooves (6) to define a plurality of ducts (12) with circular section for forming spherical boilies (B) for sport fishing; - wherein the forming roller (4) comprises a plurality of first modular components (13) coupled axially together, each first modular component (13) comprising the complete totality of at least one between the first reliefs (5) and the first grooves (6); - and/or wherein the forming body (7) comprises a plurality of second modular components (26) which can be coupled axially together, each second modular component (26) comprising the complete totality of at least one between the second reliefs (10) and the second grooves (11).