NOVELTY - The apparatus has a driving and power-take-off (PTO) arrangement equipped with an actuating mechanism. PTO units (7) convert kinetic energy of waves or tidal currents to another type of energy. Each PTO unit comprises a hydraulic power transmission mechanism including hydraulic cylinders (7h) with pistons (9) inside the cylinders. The pistons are fastened with free ends to a common connecting plate (9c) that is arranged to move the pistons simultaneously inwards into the cylinders and to draw the pistons simultaneously outwards from the cylinders.    USE - Wave energy recovery apparatus.    ADVANTAGE - The apparatus is easily and versatile way controllable, and achieves a reliable, compact, economical and efficient wave energy conversion apparatus to capture maximum amount of available wave or tidal energy, makes installation, maintenance and repairs of the wave energy conversion apparatus in an easy and quick manner, and easily disconnects/connects the PTO arrangements from/to the structure as a package without disturbing functions of the structure. The apparatus is simple in structure and lightweight in the structure and durable, and stands for long time without fatigue breakdowns massive forces caused by reciprocating motion. The apparatus endures typical fatigue stresses as energy is captured with linear pushing motion, thus saving structures of the driving and PTO arrangements. The apparatus avoids need for moving components in a case when the arrangement works reliably, and avoids need to stop reciprocating motion of a panel when the PTO unit is removed from the energy recovery arrangement for maintenance or repair purposes or installed back after maintenance or repairs. The PTO unit is provided as a separate modular structure that is easy to lock motionless and remove as a package and lift to a surface of sea for the maintenance, change or repairs. The arrangement can be easily arranged to a safe position that protects the structure of the wave energy recovery apparatus against stormy conditions, thus making dimensioning in planning phase in an easy and simple manner. The apparatus is easily controllable to work and in different weather conditions, and ensures that the energy capturing hydraulic cylinders are easily switched off without disturbing operation of other hydraulic cylinders when a part of the hydraulic cylinders and the pistons needs repair of maintenance or when apparatus is controlled according to weather or wave conditions.    DESCRIPTION OF DRAWING(S) - The drawing shows a side cross-sectional view of a driving and power-take-off arrangement of a wave energy recovery apparatus in a secondary position.    Connecting rod (4b)    PTO units (7)    Hydraulic cylinders (7h)    Pistons (9)    Common connecting plate (9c)