Machine for the manufacture of boilies for sport fishing, particularly carp-fishing, comprising: - a base frame (2, 3); - a forming roller which has a central axis substantially horizontal and which is associated with said base frame (2, 3) in a rotatable way around said central axis, said forming roller comprising a plurality of first annular reliefs spaced out by a plurality of first annular grooves; - a forming body which is statically associated with said base frame (2, 3) and which comprises at least a partially cylindrical active portion substantially tangent to said forming roller in correspondence to a circular sector of said forming roller, said forming body comprising a plurality of second reliefs which are substantially matching with said first reliefs and are spaced out by a plurality of second grooves cooperating with said first grooves to define a plurality of ducts with substantially circular section for forming substantially spherical boilies for sport fishing; wherein: - said forming roller comprises a plurality of first modular components coupled axially together, each first modular component comprising the complete totality of at least one between said first reliefs and said first grooves of said forming roller; and - said forming body comprises a plurality of second modular components which can be coupled axially together, each second modular component comprising the complete totality of at least one between said second reliefs and said second grooves of said forming body; wherein: - said forming roller comprises at least a first retention rod which extends substantially parallel to said central axis for the axial holding of said first modular components of said forming roller; - said forming body comprises at least a second retention rod which extends substantially parallel to said central axis for the axial retention of said second modular components of said forming body; - said base frame (2, 3) comprises at least two side plates arranged at the axial extremities of said forming body and characterised in that - said side plates are associated with a plurality of connection rods extending between them, and - at least one of said connection rods coincides with said second retention rod. - a base frame (2, 3); - a forming roller which has a central axis substantially horizontal and which is associated with said base frame (2, 3) in a rotatable way around said central axis, said forming roller comprising a plurality of first annular reliefs spaced out by a plurality of first annular grooves; - a forming body which is statically associated with said base frame (2, 3) and which comprises at least a partially cylindrical active portion substantially tangent to said forming roller in correspondence to a circular sector of said forming roller, said forming body comprising a plurality of second reliefs which are substantially matching with said first reliefs and are spaced out by a plurality of second grooves cooperating with said first grooves to define a plurality of ducts with substantially circular section for forming substantially spherical boilies for sport fishing; - said forming roller comprises a plurality of first modular components coupled axially together, each first modular component comprising the complete totality of at least one between said first reliefs and said first grooves of said forming roller; and - said forming body comprises a plurality of second modular components which can be coupled axially together, each second modular component comprising the complete totality of at least one between said second reliefs and said second grooves of said forming body; wherein: - said forming roller comprises at least a first retention rod which extends substantially parallel to said central axis for the axial holding of said first modular components of said forming roller; - said forming body comprises at least a second retention rod which extends substantially parallel to said central axis for the axial retention of said second modular components of said forming body; - said base frame (2, 3) comprises at least two side plates arranged at the axial extremities of said forming body and characterised in that - said side plates are associated with a plurality of connection rods extending between them, and - at least one of said connection rods coincides with said second retention rod. - said forming roller comprises at least a first retention rod which extends substantially parallel to said central axis for the axial holding of said first modular components of said forming roller; - said forming body comprises at least a second retention rod which extends substantially parallel to said central axis for the axial retention of said second modular components of said forming body; - said base frame (2, 3) comprises at least two side plates arranged at the axial extremities of said forming body and characterised in that - said side plates are associated with a plurality of connection rods extending between them, and - at least one of said connection rods coincides with said second retention rod.