A knitting support system for a knitted product, comprising a knitting machine-use adjustment data storing means (28) for storing knitting machine-use adjustment data for many knitted fabrics, a retrieved information storing means (22) for storing various parameters of knitted fabrics as retrieval information used for retrieving knitted fabrics, similar to a knitted product to be knitted, from stored knitting machine-used adjustment data, a retrieving means (24) for inputting as retrieval conditions the parameters of a knitted product to be knitted and retrieving similar knitted fabrics from retrieval information stored in the retrieved information storing means (22) according to the input retrieval conditions, and an output means (30) for reading for outputting the knitting machine-use adjustment data of knitted fabrics corresponding to retrieval results from the retrieving means (24) from the knitted machine-use adjustment data storing means (28).