A mobile wave energy conversion arrangement comprising - at least two modules (M1, M2) aligned serially with each other forming a row defining the longitudinal axis of the wave energy conversion arrangement, each of which comprises - at least one pair of a first float and a second float coupled mechanically with each other by means enabling for reciprocating displacing of these floats in relation to each other over a predetermined length along separate straight lines parallel to each other, wherein said second float is displaced out relative to said first float in the direction of the longitudinal axis, and said first float and said second float of a given module (M1, M2) are aligned serially with the corresponding, respectively, first float and second float of the adjoining module (M1, M2) along the longitudinal axis; - at least one elementary energy conversion arrangement using reciprocating movement of said first float of a given module (M1, M2) relative to said second float of this module (M1, M2); - connecting means for alternative detachable connecting with each other - either said first float of a given module (M1, M2) with said second float of the adjoining module (M1, M2) fixedly and transversely relative to the longitudinal axis, - or said first float of a given module (M1, M2) with said first float of the adjoining module (M1, M2) fixedly and longitudinally relative to the longitudinal axis and/or said second float of a given module (M1, M2) with said second float of the adjoining module (M1, M2) fixedly and longitudinally relative to the longitudinal axis, - wherein said elementary energy conversion arrangements of the adjoining modules (M1, M2) are energetically coupled with each other forming a main energy conversion arrangement. - at least two modules (M1, M2) aligned serially with each other forming a row defining the longitudinal axis of the wave energy conversion arrangement, each of which comprises - at least one pair of a first float and a second float coupled mechanically with each other by means enabling for reciprocating displacing of these floats in relation to each other over a predetermined length along separate straight lines parallel to each other, wherein said second float is displaced out relative to said first float in the direction of the longitudinal axis, and said first float and said second float of a given module (M1, M2) are aligned serially with the corresponding, respectively, first float and second float of the adjoining module (M1, M2) along the longitudinal axis; - at least one elementary energy conversion arrangement using reciprocating movement of said first float of a given module (M1, M2) relative to said second float of this module (M1, M2); - at least one pair of a first float and a second float coupled mechanically with each other by means enabling for reciprocating displacing of these floats in relation to each other over a predetermined length along separate straight lines parallel to each other, wherein said second float is displaced out relative to said first float in the direction of the longitudinal axis, and said first float and said second float of a given module (M1, M2) are aligned serially with the corresponding, respectively, first float and second float of the adjoining module (M1, M2) along the longitudinal axis; - at least one elementary energy conversion arrangement using reciprocating movement of said first float of a given module (M1, M2) relative to said second float of this module (M1, M2); - connecting means for alternative detachable connecting with each other - either said first float of a given module (M1, M2) with said second float of the adjoining module (M1, M2) fixedly and transversely relative to the longitudinal axis, - or said first float of a given module (M1, M2) with said first float of the adjoining module (M1, M2) fixedly and longitudinally relative to the longitudinal axis and/or said second float of a given module (M1, M2) with said second float of the adjoining module (M1, M2) fixedly and longitudinally relative to the longitudinal axis, - either said first float of a given module (M1, M2) with said second float of the adjoining module (M1, M2) fixedly and transversely relative to the longitudinal axis, - or said first float of a given module (M1, M2) with said first float of the adjoining module (M1, M2) fixedly and longitudinally relative to the longitudinal axis and/or said second float of a given module (M1, M2) with said second float of the adjoining module (M1, M2) fixedly and longitudinally relative to the longitudinal axis, - wherein said elementary energy conversion arrangements of the adjoining modules (M1, M2) are energetically coupled with each other forming a main energy conversion arrangement.