A method for planning an intracorporeal positioning of a puncture needle to be introduced percutaneously into a patient on the basis of a puncture plan, comprising the following method steps: a) arranging a needle guide means in a spatially fixed manner on the patient, b) generating and storing a series of cross-sectional images, respectively containing spatially resolved image information of the patient and of the needle guide means connected in a spatially fixed manner to the patient in a first coordinate system, using an imaging diagnostic method, c) selecting and visually displaying at least one cross-sectional image or a numerically generated cross-sectional image from the series of stored cross-sectional images, d) superimposing a virtual, positionally variable linear trajectory on the basis of the selected cross-sectional image, e) positioning the virtual linear trajectory on the basis of the puncture plan to obtain a target linear trajectory, in which the virtual linear trajectory traverses the needle guide means , f) numerically determining spatial coordinates of two separate spatial points, the so-called traverse points (T1, T2), within the first coordinate system, at which traverse points the target linear trajectory traverses the needle guide means , g) transforming of spatial coordinates relating to the needle guide means and to the traverse points (T1, T2) to a second coordinate system, characterized in that the needle guide means comprises at least one upper plate element , arranged away from the patient, and a lower plate element , arranged facing the patient, which are spaced rigidly apart from one another and provide respectively a plurality of through-holes for the guiding through of a puncture needle , that the positioning of the virtual linear trajectory is carried out on the basis of the puncture plan to obtain the target linear trajectory in such a way that the target linear trajectory runs respectively through the through-hole of the upper and lower plate element , and that the needle guide means is visually displayed within the second coordinate system in such a way that the traverse points (T1, T2) are displayed in a visually perceptible marked manner on the needle guide means . a) arranging a needle guide means in a spatially fixed manner on the patient, b) generating and storing a series of cross-sectional images, respectively containing spatially resolved image information of the patient and of the needle guide means connected in a spatially fixed manner to the patient in a first coordinate system, using an imaging diagnostic method, c) selecting and visually displaying at least one cross-sectional image or a numerically generated cross-sectional image from the series of stored cross-sectional images, d) superimposing a virtual, positionally variable linear trajectory on the basis of the selected cross-sectional image, e) positioning the virtual linear trajectory on the basis of the puncture plan to obtain a target linear trajectory, in which the virtual linear trajectory traverses the needle guide means , f) numerically determining spatial coordinates of two separate spatial points, the so-called traverse points (T1, T2), within the first coordinate system, at which traverse points the target linear trajectory traverses the needle guide means , g) transforming of spatial coordinates relating to the needle guide means and to the traverse points (T1, T2) to a second coordinate system, <EOS>