diff --git a/conf/errors.conf.sample b/conf/errors.conf.sample
index 6c8a106..84541cb 100644
--- a/conf/errors.conf.sample
+++ b/conf/errors.conf.sample
@@ -30,6 +30,9 @@ err_git_runner_groupname_empty=38
 err_git_runner_group_not_exist=39
 err_runner_deployer_groupname_empty=40
 err_runner_deployer_group_not_exist=41
+err_pipeline_sock_dir_empty=42
+err_pipeline_sock_dir_not_directory=43
+err_pipeline_sock_dir_not_writable=44
 
 # JSON parsing errors
 err_json_bad_format=51
diff --git a/src/pipeline.sh b/src/pipeline.sh
index 52a1c97..5fdb303 100755
--- a/src/pipeline.sh
+++ b/src/pipeline.sh
@@ -171,6 +171,18 @@ main() (
 			"${err_git_runner_group_not_exist}"
 	fi
 
+	if [ -z "${pipeline_sock_dir}" ]; then
+		fail "Variable pipeline_sock_dir is empty." "${err_pipeline_sock_dir_empty}"
+	fi
+	if [ ! -d "${pipeline_sock_dir}" ]; then
+		fail "Directory pipeline_sock_dir='${pipeline_sock_dir}' does not exist." \
+			"${err_pipeline_sock_dir_not_directory}"
+	fi
+	if [ ! -w "${pipeline_sock_dir}" ]; then
+		fail "Directory pipeline_sock_dir='${pipeline_sock_dir}' is not writable." \
+			"${err_pipeline_sock_dir_not_writable}"
+	fi
+
 	# Generate pipeline tmp sock.
 	tsp="$(date +%s)"
 	random="$(echo "${RANDOM}" | md5sum | head --bytes 32)"