the invention relates to an apparatus for fetal scalp blood sampling , having a shaft , a blade that is mounted removably in the distal end of the shaft and that can be slid by means of a positioning mechanism between a starting position mounted in the and a working position extending beyond the distal end of the shaft , and also having a blood sampling device mounted on the distal end of the shaft . to create an apparatus for fetal scalp blood sampling that is easy to operate and also ensures a high degree of operating safety , it is proposed with the invention that the blade can be fixed by the positioning mechanism in the respective end position .